Cheat Sheet


mAh stands for Milliamp Hours and quantifies the energy storage capacity. It is based on how long a battery will last when power is drawn constantly, e.g. a 2000 mAh battery will power a device drawing 100 mAh for 20 hours


Short for ampere, this is a unit of current, not a unit of charge. It describes the constant and average current that passes through the circuit.

Shared vs. Total

Shared power banks will provide power where it's needed, e.g. a 2 x 1.7A [3.4A shared] will charge two smartphones at 1.2A each, or one tablet at 2.4A. Some multi-port power banks (aka portable chargers) will have fixed outputs on each port, e.g. a 2 x 1.2A [2.4A total] and will charge two smartphones at 1.2A. This is what is referred to as, "total" power.


A mobile phone with an advanced mobile operating system, usually with internet access, touchscreen interfaces, cameras, media players and the ability to run third-party apps.


A mobile computer with a touchscreen display, circuitry and battery in a single, portable device, usually featuring pop-up, virtual keyboards for typing.


USB port

Short for Universal Serial Bus port, a USB port is designed for use with an industry standard connector to communicate data and supply electric power between devices.

Standard USB-Also known as USB-A

The most common, universal connector on the "other end" of most current USB cables, is a USB-A. These are often suitable for use with computers, car chargers, wall chargers, and many other devices.


Micro USB is a USB connector that is smaller than USB-A, and is often found on smaller or thinner mobile devices, such as android smartphones, digital cameras, battery pack input ports, Kindle readers and many others.

USB-C - Also known as Type-C

USB-C is a new type of USB connector, hailed as the new standard. Smaller, faster and more user-friendly than previous USB types, USB-C has widespread support from industry leaders, meaning that USB-C will come to replace all other USB types.


A connector developed by Apple to replace the 30-pin connector. Used across all iPhone, iPod and iPad releases since iPhone 5, iPod Touch (5th generation) and iPad 4th generation.

Optimal Charging

The fastest possible charging for the connected device is optimal charging. Larger devices require more power, so a charger with limited output may still power up, but will take longer to fully charge

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