Like a deluxe version of the DIY MintyBoost AA charger, here’s a DIY that explains how to assemble a USB charger that is not only rechargeable—with a Lithium Polymer battery—but also solar powered.
https://gizmodo.com/mintyboost-diy-aa-usb-charger-177527
For this DIY, you will need an Altoids tin, a $20 MintyBoost kit, lithium polymer battery chargery, solar cell, velcro, tape, scissors, pliers, metal shears and a soldering iron among other similar tools. Although putting this charger together sounds quite difficult, the outcome is pretty cool and it’ll save you a few bucks on your electric bill as it gives your phone a minty-fresh boost. [Instructables via Lifehacker]
https://lifehacker.com/diy-solar-powered-iphone-or-ipod-charger-5242814
