Power Banks Guide
Battery capacity
One of the crucial factors to consider when choosing a power bank is its battery capacity. Battery capacity is measured in milliampere-hours (mAh) which denotes the amount of charge a power bank can hold. The higher the capacity, the more charges it can provide to your devices. For example, the Anker PowerCore 26800mAh power bank is an excellent choice for those seeking an impressive battery capacity. With its colossal 26,800mAh capacity, this power bank can recharge an iPhone 11 up to 6 times or a Samsung Galaxy S20 four times, without needing to be recharged itself. However, if you seek a slightly more compact option, the RAVPower 16750mAh Portable Charger could be ideal. This power bank has a respectable capacity that can recharge an iPhone SE up to 6 times or an iPad Air 2 nearly twice before needing to be juiced up again.
Portability
Portability:
When choosing a power bank, one of the key factors to consider is its portability. A power bank should be lightweight and compact, making it easy to carry around in a bag or pocket. If you are frequently on the go or traveling, a slim and lightweight power bank would be an ideal choice.
In terms of portable power banks, Anker PowerCore Slim 10000 PD is an excellent option. With a slim profile and weighing just 7.2 ounces, it offers great portability without compromising on power capacity. Supporting Power Delivery fast charging, it can charge an iPhone 11 Pro up to 50% in just 30 minutes. Another popular choice is the RAVPower 26800mAh Power Bank. While it is not as slim as the Anker Slim, it offers a massive 26800mAh capacity, providing multiple charges for your device. With two 2.4A USB ports, it enables simultaneous charging for two devices. For those looking for extreme portability, the Anker PowerCore+ Mini 3350mAh Lipstick-Sized Portable Charger is an excellent choice. Weighing only 2.8 ounces and compact enough to fit in your pocket, it provides a full charge for most smartphones.
USB ports
USB ports determine how many devices you can charge at once and the compatibility with different devices. For example, the Anker PowerCore 26800 Portable Charger is equipped with three USB ports, allowing you to charge multiple devices simultaneously. It features two standard USB ports and one USB-C port, offering fast charging for various devices, including smartphones, tablets, and even laptops. Another great option is the RAVPower Portable Charger 20000mAh, which comes with two USB ports: one USB-C PD port and one Qualcomm Quick Charge 3.0 port. This provides efficient charging for both USB-C compatible devices and those that rely on Quick Charge technology. These power banks offer versatile charging abilities for different device types and are ideal for users who require multiple ports.
Charging speed
It determines how quickly your devices will charge and how much time you can save. Look for power banks with fast charging technologies like Power Delivery (PD) or Quick Charge (QC) to ensure faster charging times. One great option is the Anker PowerCore Speed 20000 PD that comes equipped with Power Delivery technology, capable of delivering up to 22.5 watts of power, ensuring incredibly fast and efficient charging. Another notable choice is the RAVPower 26800mAh PD Portable Charger, which also supports Power Delivery and offers a maximum output of 30 watts, allowing you to charge up your devices rapidly.
Product Segments based on charging speed:
- Entry-level: The Xiaomi Mi Power Bank 2i 10000mAh is an affordable power bank with a charging speed at 5 volts. It may not have the fastest capabilities, but it's suitable for basic charging needs and provides a reliable power source.
- Mid-range: The Anker PowerCore Quick Charge 3.0 20000mAh offers fast charging with Qualcomm Quick Charge 3.0 technology, enabling devices to charge up to 4 times faster than standard chargers.
- High-end: The
Zendure Supertank 27000mAhpower bank stands out with multiple fast charging options. It supports both USB Power Delivery and Quick Charge, allowing you to choose the most efficient charging method for your device. With a massive capacity and fast charging capability, it's ideal for heavy users or those always on the go.
Battery type (lithium-ion, lithium-polymer, etc.)
The most commonly used types are lithium-ion and lithium-polymer. Lithium-ion batteries are known for their higher energy density and longer lifespan compared to other battery types. They are also more stable and can handle a higher number of charge cycles. An excellent example of a power bank with a lithium-ion battery is the Anker PowerCore 10000. This power bank offers a capacity of 10,000mAh, allowing users to charge their devices multiple times before needing to recharge the power bank itself.
On the other hand, lithium-polymer batteries offer a slim and lightweight design, making them ideal for those looking for a portable power bank. They also provide a higher level of safety and reliability, as they are less prone to overheating or leaking. The RAVPower 26800mAh Portable Charger is a great choice for those in need of a power bank with a lithium-polymer battery. With its large capacity and multiple charging ports, this power bank is capable of charging multiple devices simultaneously.
It's important to note that both lithium-ion and lithium-polymer batteries have their advantages, and the choice ultimately depends on individual needs and preferences.
Durability
Look for power banks that are built to last and can withstand daily use and travel. One option that offers excellent durability is the Anker PowerCore 26800 Portable Charger. It features a high-capacity 26800mAh battery and has been tested to withstand drops, impacts, and even extreme temperatures. Another reliable option is the RAVPower 22000mAh Portable Charger. It is manufactured using premium materials and has undergone rigorous testing to ensure its durability. Additionally, the Xiaomi Mi Power Bank Pro is well-known for its durability, with a reinforced outer shell that provides resistance against scratches and daily wear and tear. When it comes to durability, it is important to opt for power banks from trusted brands that have a proven track record for quality and long-lasting performance.
Weight
A lightweight power bank is more convenient to carry around, making it suitable for travelers and those always on the go. One example of a lightweight power bank is the Anker PowerCore Slim 10000 PD. Weighing only 7.6 ounces (215 grams), it is extremely portable and can easily fit in a pocket or bag. Another option is the RAVPower 20000mAh Power Bank, which weighs 13.3 ounces (377 grams) but still falls into the lightweight category. Segmenting the market into different weight groups, we can find power banks in the ultra-light category, such as the Anker PowerCore Lite 10000 mAh. Weighing only 6.88 ounces (195 grams), it is designed for those who prioritize weight savings without compromising on capacity.
Size
Larger power banks usually have more capacity and can provide more charges, whereas smaller power banks are more portable and easy to carry. For those who prioritize portability, compact power banks like the Anker PowerCore 5000 are an ideal choice. With a sleek and lightweight design, this power bank can easily fit into your pocket or bag. On the other hand, if you need a power bank with a larger capacity, the RAVPower 26800mAh Power Bank is a great option. With its massive capacity, this power bank can charge your devices multiple times before needing to be recharged itself.
It's worth noting that power banks are available in different segments based on their size and capacity. Mini power banks, such as the Poweradd Slim2 5000mAh Power Bank, are highly portable and ideal for on-the-go charging. Medium-sized power banks, such as the Anker PowerCore 10000, strike a balance between portability and capacity. These power banks are suitable for both daily use and traveling. Large power banks, like the Anker PowerCore+ 26800 PD, feature an extensive capacity and can charge heavier devices like laptops and cameras. These power banks are perfect for extended outdoor activities or times when AC power isn't readily available.
Input and output voltage
The input voltage refers to the power required to charge the power bank itself, while the output voltage determines the ability to charge other devices. It is crucial to select a power bank that offers compatibility with your devices.
Different power banks offer different input and output voltage options. A popular choice for those looking for high input voltage is the Anker PowerCore+ 26800 PD, which provides a 27W input for fast charging of the power bank itself. Another option that offers convenience with its multiple input voltage options is the RAVPower 30W 3A Quick Charger.
For output voltage, power banks like the RAVPower 26800mAh Portable Charger are capable of delivering 5V/2.4A output, suitable for most smartphones and tablets. On the other hand, the Anker PowerCore 26800mAh Portable Charger offers a higher output voltage of 5V/3A, making it ideal for fast charging supported devices.
It's worth noting that power banks are available in various segments based on their capacity, such as compact power banks like the Jackery Portable Charger Bar or high-capacity power banks like the MAXOAK 13000mAh Power Bank. However, always ensure that the input and output voltage of the power bank meet your device's requirements.
Compatibility with devices
Look for power banks that offer a wide range of compatibility, such as the Anker PowerCore 10000 and the RAVPower 26800mAh. The Anker PowerCore 10000 supports charging for most smartphones and tablets, including Apple, Samsung, and Google devices. It comes with a standard USB port and is compatible with devices that charge via USB-C and Micro USB. On the other hand, the RAVPower 26800mAh features three iSmart 2.0 USB ports, allowing you to charge multiple devices simultaneously. It is compatible with a wide range of devices, including iPhone, iPad, Samsung, LG, and more. Both power banks are designed with compatibility in mind, making them an excellent choice for a wide variety of devices.
Quick charge support
Quick Charge technology allows for faster charging of compatible devices. The latest version of Quick Charge is Quick Charge 4+, which is designed to provide lightning-fast charging speed while ensuring optimum battery life.
One power bank that supports Quick Charge 4+ is the Anker PowerCore+ 26800mAh Power Bank. This power bank features a USB-C port with Power Delivery and Quick Charge 3.0 support. It is capable of charging devices at incredibly fast speeds and is compatible with a wide range of devices, including smartphones, tablets, and even laptops.
In the budget-friendly segment, the RAVPower Portable Charger 20000mAh is a solid option. It supports Quick Charge 3.0 and has a high-capacity battery to keep your devices charged throughout the day. With its multiple fast-charging ports, it can efficiently charge multiple devices simultaneously.
When choosing a power bank, it is important to consider whether it supports Quick Charge technology. This can significantly reduce charging time and ensure that your devices are powered up quickly.
Wireless charging support
This allows you to conveniently charge your devices without dealing with tangled cables. An excellent example of a power bank with wireless charging support is the Anker PowerCore 10,000mAh Wireless Power Bank. With its Qi-certified wireless charging pad, it allows you to charge your compatible devices simply by placing them on top of the power bank. Another notable option is the RAVPower 20,000mAh Power Bank with Wireless Charging. This power bank features a high-capacity battery and supports both wired and wireless charging. It is Qi-certified and includes an advanced chipset for efficient charging. These power banks make charging on-the-go effortless and hassle-free.
Number of charging cycles
The number of charging cycles refers to the number of times the power bank can be fully charged and discharged before its performance starts to deteriorate. This is often specified by the manufacturer and can typically range from 500 to 1,000 cycles.
For users who require a power bank with a higher number of charging cycles, the Anker PowerCore 10000 PD Redux is a great option. With its 10,000mAh capacity, it offers around 500 charging cycles, ensuring a long-lasting and reliable power supply for smartphones and other devices. Another recommended power bank for those looking for a higher capacity and a higher number of charging cycles is the RAVPower 26800mAh Portable Charger. With its massive 26,800mAh capacity and more than 500 charging cycles, it is perfect for long trips or when you need a dependable power backup.
Overcharge protection
This ensures that your device's battery is not overcharged, preventing any potential damage or decreased battery lifespan. An excellent option that offers this protection is the Anker PowerCore 10000 PD Redux. With its intelligent power management system, it safeguards your devices by automatically adjusting the output voltage based on the connected device. Another notable power bank is the RAVPower 26800 PD. Equipped with a built-in chip, it provides optimized charging current according to different devices, protecting them from overcharging. Both of these power banks also have additional safety features like short-circuit protection and high-temperature protection, ensuring a reliable charging experience.
Short circuit protection
This feature ensures that your devices are protected from accidental short circuits, which can cause damage or even fires. Look for power banks that offer built-in short circuit protection such as the 'Anker PowerCore 10000mAh Portable Charger'. This power bank utilizes advanced circuitry to automatically detect and stop any short circuit, keeping your devices safe and secure. Another option is the 'RAVPower 26800mAh Battery Pack', which not only provides substantial power capacity but also incorporates short circuit protection to prevent any unforeseen mishaps. Remember to prioritize power banks with these safety features to guarantee the optimal performance and protection of your devices.
Temperature protection
A power bank with temperature protection ensures that it operates within a safe temperature range, preventing overheating or damage to the battery. One example of a power bank that offers temperature protection is the Anker PowerCore 26800 Portable Charger. This power bank is equipped with advanced temperature control technology, which intelligently regulates its temperature to prevent any excess heat buildup during charging. Another option is the RAVPower 26800mAh Power Bank, which also incorporates temperature protection mechanisms to maintain a safe temperature and prolong battery life. Both these power banks have been designed to prioritize user safety and ensure optimal performance, making them reliable choices for those in need of a power bank with temperature protection.
LCD screen
The LCD screen allows you to easily monitor the exact percentage of charge left on your power bank, giving you a clear idea of how much power you have available. This ensures that you never run out of charge unexpectedly and enables you to plan your charging needs accordingly. For instance, Anker PowerCore 26800 Portable Charger comes with an LCD screen that displays the remaining capacity in percentages and provides a clear visual indication of the charge level. Another example is RAVPower 20000mAh Portable Charger, which features an LCD display showing the percentage of energy left in real-time, alongside symbols that indicate charging status. With these power banks sporting LCD screens, you can have peace of mind knowing exactly how much power is available for your devices.
LED indicators
These indicators provide a convenient way to check the remaining battery level of the power bank, allowing you to plan your usage accordingly. Some power banks, such as the Anker PowerCore 10000, feature a smart LED wheel that shows an accurate and intuitive representation of the remaining power, eliminating any guesswork. Another excellent option is the RAVPower 26800mAh Portable Charger, which is equipped with four LED lights that provide a clear and precise indication of the battery's remaining power percentage. The LED indicators on these power banks are highly beneficial, especially during travel or emergencies, as they ensure you never run out of power unexpectedly.
When it comes to LED indicators, power banks can be categorized into two groups. The first group includes power banks with basic LED indicators that use a few lights to represent the battery levels, such as the Anker PowerCore 10000. These indicators generally signify three or four battery levels – high, medium, low, and empty. The second group includes advanced power banks like the RAVPower 26800mAh Portable Charger, which offer more precise LED indicators, often displaying the remaining percentage of battery power. These indicators provide more detailed information about the battery level and allow for more efficient planning when using the power bank.
Solar charging capability
Solar power banks allow you to harness the energy of the sun to charge your devices, making them a great option for outdoor activities and emergency situations. When looking for a power bank with solar charging capability, it's important to note the conversion efficiency, which determines how effectively the solar panels convert sunlight into usable energy. For instance, the Blavor Solar Charger Power Bank features a high conversion efficiency of up to 25%, ensuring efficient solar charging. Another option is the RAVPower Solar Charger Power Bank, which also boasts a high conversion efficiency of up to 22%. These power banks not only provide reliable charging on the go but also help conserve energy and reduce your carbon footprint.
Fast charging capability
The ability to charge your devices quickly can be a game-changer, especially when you're running low on battery and need to juice up on the go. One power bank that offers fast charging is the Anker PowerCore 10000 PD. It employs Power Delivery (PD) technology, allowing it to charge compatible devices at blazing speeds. With a USB-C output, it can deliver up to 18W of power, giving your phone a boost in no time. Another option is the RAVPower 26800mAh PD Portable Charger. Its powerful PD output can reach up to 30W, enabling not only fast charging for your smartphones but also laptops and tablets.
In the market, there are several power bank options classified based on their fast-charging capabilities. Entry-level power banks like the Aukey 10000mAh Power Bank offer a respectable charging speed of up to 18W. Mid-range power banks, such as the Xiaomi Mi Power Bank 3 Pro, take it a step further with 45W fast charging capabilities, providing even faster and more efficient charging. For those seeking top-of-the-line performance, advanced power banks such as the RAVPower 20000mAh 60W PD 3.0 Power Bank deliver lightning-fast charging at up to 60W, meeting the demands of power-hungry devices like laptops or high-end smartphones. Ultimately, choosing the right power bank with fast charging capability ensures your devices are powered up swiftly whenever you need them.
Multi-device charging capability
This feature allows you to charge multiple devices simultaneously, making it an excellent option for individuals who rely on several electronic devices. One notable power bank that offers this capability is the Anker PowerCore 26800 Portable Charger. With three USB ports and a substantial 26800mAh capacity, it provides a fast charging experience for multiple devices. Another great option is the RAVPower 32000mAh Power Bank. Equipped with two 2.4A iSmart USB ports and one 12V/1.5A DC output, it allows you to charge up to three devices at once, including smartphones, tablets, and even laptops. By considering power banks with multi-device charging capability, you can ensure that all your devices stay powered up even during extended outings or travel.
Power output
It refers to the amount of power the power bank can deliver to your devices. The power output is typically measured in volts (V) and amperes (A). To choose the best power output for your needs, it's essential to check the specifications of the power bank.
One popular power bank that offers a high power output is the Anker PowerCore 26800 Portable Charger. It features a remarkable output of 5V/3A, allowing for fast charging of your devices. Another superior option is the RAVPower 20000mAh Portable Charger. It offers a dual output of 5V/2.4A, enabling you to charge two devices simultaneously. For those who require even more power, the RAVPower 32000mAh Power Bank can deliver an output of up to 6A, making it ideal for power-hungry devices such as tablets and laptops. With these power banks, you can ensure a reliable and efficient charge for your devices.
Pass-through charging
This is especially useful when you have limited charging outlets or are in a hurry. One example of a power bank that offers pass-through charging is the Anker PowerCore+ 26800 PD. With its Power Delivery (PD) technology, it can charge compatible devices at up to 45W while recharging itself at the same time. Another option is the RAVPower 26800mAh Portable Charger, which also supports pass-through charging and features three USB ports, allowing you to charge multiple devices simultaneously. These power banks are suitable for those who are constantly on the go and require a reliable power source without compromising on their device's charging.
Built-in flashlight
This can come in handy during emergencies or when you're doing activities such as camping or hiking. Some power banks on the market offer this feature, providing illumination wherever you need it.
For example, the Anker PowerCore 20100mAh Power Bank boasts a built-in flashlight with three modes: low, medium, and high brightness. It also has a sleek and compact design, making it easy to carry around. Another option is the RAVPower 26800mAh Portable Charger. It features a built-in flashlight with a SOS mode, perfect for emergency situations. Additionally, this power bank has a massive capacity and provides multiple charging options.
A built-in flashlight can be a useful addition to a power bank, making it an excellent option for those seeking added functionality in their portable charger.
Multiple charging cables included
This is beneficial because it allows you to charge multiple devices simultaneously, saving you time and hassle.
For example, the Anker PowerCore 20000mAh Portable Charger offers the convenience of multiple charging cables. It comes with two USB-A ports, allowing you to charge two devices simultaneously. Additionally, it includes a micro USB cable, which is compatible with many Android devices, as well as an accompanying USB-C cable for charging new-age devices.
Another option is the RAVPower 26800mAh Power Bank. This power bank not only features three USB ports for simultaneous charging, but it also includes a micro USB cable and an Apple Lightning cable. This is ideal for those who have both Android and Apple devices or for traveling with friends or family who may need to charge their devices as well.
In summary, having multiple charging cables included in a power bank can greatly enhance its usefulness and convenience. Consider checking out power banks like the Anker PowerCore 20000mAh Portable Charger and the RAVPower 26800mAh Power Bank, which provide this feature along with other impressive specifications.
Shockproof design
A power bank with a shockproof design will offer robust protection against accidental drops and impacts, ensuring that it remains intact and functional in various situations.
Some power bank models with shockproof design include the Anker PowerCore+ 26800 PD, which comes with a high-quality aluminum-alloy casing and a silicone shell for added durability. This power bank is designed to withstand everyday use and can even tolerate drops from up to 3 feet. Similarly, the RAVPower 16750mAh Power Bank features a rugged construction that is resistant to shock, making it an ideal choice for outdoor activities and adventures. Additionally, it is worth considering the Zendure 26800mAh Power Bank, which is encased in a shock-resistant outer shell combined with a reinforced corner design to protect it from accidental shocks and drops.
In summary, investing in a power bank with a shockproof design is essential to ensure its longevity and functionality. Brands like Anker, RAVPower, and Zendure offer durable power banks that are specifically designed to withstand shock and keep your portable charging solution protected in various environmental conditions.
Water-resistant design
This feature ensures that your power bank remains functional even in wet conditions, making it an ideal choice for outdoor activities or travel destinations with unpredictable weather. One notable product in this category is the Anker PowerCore+ 26800 PD, which is equipped with an IP68 rating, indicating its water and dust resistance. Another option is the Sony CP-W5, designed with a rugged and waterproof exterior to withstand outdoor adventures. These power banks provide reliable charging capabilities while offering the added advantage of water resistance.
Anti-slip surface
An anti-slip surface ensures that the power bank stays securely in place, preventing accidental slips and falls. One power bank that features an excellent anti-slip surface is the Anker PowerCore 10000 Portable Charger. It is designed with a textured exterior that provides a firm grip, making it ideal for users who are frequently on the move. Another option is the RAVPower Portable Charger 20000mAh, which also has a non-slip coating that adds extra stability, even when placed on slippery surfaces. By selecting a power bank with anti-slip capabilities, you can have peace of mind knowing that your device will stay firmly in place, regardless of its orientation.
Multi-layer safety protection
Look for power banks that offer multi-layer safety protection to ensure the safety of your devices and yourself. One such example is the Anker PowerCore 26800 Portable Charger. This power bank is equipped with multiple safety features, including surge protection, short circuit prevention, and temperature control, safeguarding your devices against potential damage.
Another power bank that offers comprehensive safety features is the RAVPower 26800mAh PD Portable Charger. It comes with advanced protections such as overvoltage protection, overcurrent protection, and overcharge protection. These features actively monitor and regulate the power flow to prevent any potential harm to your devices.
Segmenting the market, there are power banks specifically designed for outdoor activities and extreme conditions. One example is the VITCOCO Solar Charger Power Bank, which not only includes multi-layer safety protection but also features a solar panel for charging during outdoor adventures. For those who require a power bank with high capacity, the POWERADD EnergyCell 20000mAh Power Bank offers multi-layer safety protection alongside a large battery capacity to charge multiple devices multiple times.
Output current
The output current determines how fast your devices will charge when connected to the power bank. Most power banks come with different output currents, usually ranging from 1A to 2.4A.
If you are looking for a power bank with a high output current, the Anker PowerCore 26800 Portable Charger is an excellent choice. With its triple-speed charging, it features three USB ports that offer a combined output of 6A, allowing you to charge multiple devices simultaneously at an impressively fast speed. Another option for high output current is the RAVPower 26800mAh Power Bank. With its maximum output of 2.4A per port, it provides rapid charging for your devices and its huge capacity ensures that you can charge your devices multiple times before it needs to be recharged. These power banks are perfect for those who require fast charging capabilities to quickly power up their devices.
Input current
A higher input current means that the power bank can recharge at a faster rate, providing more convenience when you need to quickly recharge your devices on the go.
In the market, power banks can be divided into different categories based on their input current. The first category includes power banks with a relatively low input current, such as the Anker PowerCore 5000 Portable Charger. This power bank offers an input current of 2A, allowing you to recharge it within 4.5 hours. In the mid-range category, power banks like the RAVPower 10000mAh Power Bank stands out with an input current of 4.5A, resulting in faster recharging times, taking only 3.5 hours to fully recharge. Additionally, in the high-end category, power banks like the RAVPower 26800mAh Portable Charger offer an impressive input current of 6A, providing incredibly swift recharging speeds and fully rejuvenating the power bank in just 4 hours.
Price
While it's tempting to go for the cheapest option available, it's essential to strike a balance between affordability and quality. High-quality power banks with reliable performance typically have higher price points, but they also offer several advantages. The Anker PowerCore 10000 is a mid-range power bank that offers a capacity of 10,000mAh, allowing multiple charges for most smartphones. Priced at around $30, it provides a solid balance between price and capacity. For those looking for budget options, the RAVPower Portable Charger is a more affordable choice, priced at around $20, with a capacity of 6700mAh. While it offers a slightly lower capacity, it still provides sufficient power to charge most smartphones at an affordable price point.
Variety of brands
When it comes to power banks, there is a wide variety of brands available in the market today. Each brand has its own set of pros and cons, making it important to choose one that suits your needs.
One popular brand in the power bank market is Anker. They are known for their high-quality, reliable power banks that offer fast charging capabilities and excellent battery capacity. Anker power banks also often come with features like compatibility with Quick Charge technology and multiple charging ports, allowing you to charge multiple devices simultaneously. However, with their reputation for quality, Anker power banks can be a bit more expensive compared to other brands.
Another well-known brand is RAVPower. They offer a range of power banks with different capacities and charging speeds. RAVPower power banks are known for their durability and long battery life. They also often include features like intelligent circuitry to protect your devices from overcharging and short-circuiting. However, some users have reported that RAVPower power banks may take longer to charge compared to other brands.
In terms of power bank groups or segments, there are also specific products tailored for camping or outdoor use, such as the Jackery Explorer 240 Portable Power Station. This power bank features a large battery capacity of 240Wh and multiple output ports, allowing you to charge various devices on your outdoor adventures. For travel purposes, the RAVPower Portable Charger 10000mAh Power Bank is a compact and lightweight option that can fit easily in your pocket.
Remember to consider your specific charging needs and compare the different brands based on factors like charging speed, capacity, and additional features before making your final decision.