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Capacity:
One of the most important features of power banks is their capacity, which indicates how much charge the battery can store. The unit of measurement is milliampere-hour (mAh). However, this number alone doesn't provide enough information and cannot be directly compared with the capacity of other batteries. It's important to know at what voltage this capacity is measured. The product of the capacity and voltage gives the total stored energy, expressed in watt-hours (Wh).
The capacity values shown on our website are based on the 3.7 V standard used for power banks.
If you want to know how many times a specific product can charge your phone or tablet, click the "Calculator" tab on the product page and enter your device's battery capacity.
Attention:
If you see batteries on other websites with capacities of 50,000 or 100,000 mAh, be cautious. These batteries would be the size of a laptop and could weigh 1–1.5 kg. These are likely fake products that can not only deceive you but may also damage your device.
Input Voltage:
Unit: Volt [V]
It determines the maximum voltage at which the power bank can be charged. The higher this value, the faster the charging—provided your wall charger supports this voltage as well.
Example: If your battery can be charged with 9V, you need a wall charger that also provides 9V to take advantage of this.
Input Current:
Unit: Ampere [A]
This indicates the maximum current at which the power bank can be charged. A higher value means faster charging—as long as your charger supports that current.
Example: If your battery supports charging at 2A, use a wall adapter with at least 2A output.
Output Voltage:
Typically 5V, but some power banks can deliver up to 12–18V, which is used by fast-charging systems in phones for quicker charging.
Output Current:
As with voltage, the higher the output current, the faster your device will charge. However, if your phone only accepts 1A, it won’t benefit from a 3A output.
Knowing your device’s input current helps in choosing a suitable power bank. A 2A output is already a safe and efficient choice.
Number of Outputs:
A dual-port power bank can charge two devices simultaneously. If specific port specs are not provided, the total available power is distributed between the ports automatically.
