We also have portable power banks which are solar powered - genuis right? They are a fantasic piece of kit as it charges via the sun so is already at an advantage for all you explorers out there! The charging time from scratch is just a measly 4 hours.
How to choose your perfect power bank
Start off by choosing the size of your power bank. The size is all about the power inside - the number of mAh capacity (Milliamp Hours). The bigger the number, the more power you will get, which means more recharges for your smartphone or charging for bigger devices which require more power such as a smartphone tablet.
A bigger power bank will have 2 USB ports, so you can fully charge multiple devices such as two lithium ion devices at the same time, or charge your phone and your android devices/gopro/other USB device together! With multiple ports, simultaneous charging is easy!