Charging your device (External batteries)
When you've splashed out for an external battery device, you'd like to think it charges the same as the in-built battery devices. Unfortunately, this is not the case.
Charging 18650/21700 batteries requires a bit more work than you'd like. You can plug them in at the wall however, this can cause the batteries to overheat, drain faster and not charge correctly.
The best way to charge these types of batteries is by getting yourself a Battery Dock. These devices are specially made to preserve the life/charge of a battery and, the added bonus? You can charge them overnight!
If you want to have a look at our different chargers, You can look here.