For hikers and campers a small power bank apparently is not enough, you can prepare a large-capacity backup battery or take a look at the folding USB solar cell with backup battery, it may be a better solution.
You can use a solar panel-equipped backup battery to charge your mobile devices. If you want a more innovative option, the following Epiphany onE Puck portable charger should be able to catch your eyes.
Apparently the special bonsai tree is not only a nice decoration for your home, but also an eco-friendlysolar charger for your gadgets. If you’re curious, let’s go on checking electree+ the bonsai tree shaped solar charger.