External batteries come in all shapes and sizes, nowadays. They come with various additional features, cases made out of different materials, their storage capacities are smaller or larger, however, they also come with different output amperages.
While most may overlook this feature, the amperage is extremely important for two very distinct reasons:
- Some devices require a particular voltage in order to charge effectively. Some don’t charge at all unless they receive the right amount of power, while others may break due to a lower or higher than specified current;
- Amperage determines the speed at which your devices draw power from the external battery.
More is better, especially when charging high-performance devices
Most external batteries typically come with one of two USB output ports: 1A or 2A. These usually dictate the purpose of the powerbank test, as 1A is usually suited for smartphones and extremely power-efficient tablets, while 2A is the one to use for high-power tablets.
There are even devices that will leach the energy stored in a power bank, through a 1A port, but will not charge if used while connected. Newer models of power banks even come with A2.4 output ports that can charge a phone in a couple of hours and a tablet in 3-4 hours.
However, it is important to remember that some devices cannot benefit from the greater amperage and will not charge faster, no matter what kind of output port an external battery has. It’s usually best to look at the device specifications prior to making a purchase.
Furthermore, some external batteries have a feature that will identify the capacity of your device’s battery and will choose what amperage to deliver in order to charge it. This system does not require a particular output port, as the power bank’s controller will regulate the power flow.