A power bank with 10,000 mAh or more can charge a phone up to 4 times without being recharged and can recharge a tablet up to 2. 5 times without being recharged. [2] X Research source You can find guides for picking the right power bank capacity for your device by searching online. [3] X Research source
The dimensions of the iQunix MiniPower, for example, are 4 inches (10 cm) by 0. 9 inches (2. 3 cm) by 0. 9 inches (2. 3 cm), but only has a 3,350 mAh capacity. [5] X Research source The Anker PowerCore II 20000, on the other hand, has a charging capacity of 20,000 mAh and dimensions of 6. 7 inches (17 cm) by 2. 5 inches (6. 4 cm) by 0. 8 inches (2. 0 cm).
The higher the amperes of the output, the faster your device will charge; the higher the amperes of the input, the faster your power bank will recharge.
PC World, for example, lists the Mophie Powerstation Plus XL ($99. 95) as the best overall power bank of 2018 and the Xiaomi 10,000mAh Mi Power Bank Pro ($29. 99) as the most portable. [8] X Research source
A refurbished battery won’t last as long and could potentially be unsafe. [9] X Research source
As of August 2018, the Anker PowerCore 10000 With Quick Charge 3. 0 with a 10,000 mAh capacity, for example, is listed at a price of $29. 99 by “PC Magazine”, while the iMuto Portable Charger X6 Pro with a 30,000 mAh capacity is listed at $50. 39, and the Mophie Powerstation AC with a 22,000 mAh capacity is listed at $199. 95. [10] X Research source
Remember that charging multiple devices on your power bank means that it will need to be recharged more frequently. [12] X Research source
Ideally, you should look for a power bank that charges using the same type of cable as your device(s). That way, you only need one cable for both.
Search for the reviews for the power bank as well to see if anyone mentions how well the LED works.
