Apparently a backup battery is very necessary for those who are always on the go, but if you also want an eco-friendly way to charge your mobile devices, the following Solar Window portable charger may be able to meet your requirements.
This is an eco-friendly backup battery that measures 11 x 11 x 1.75cm and weights 150g. As we can see from the images, the backup battery features compact design for portability, and comes with a suction in order that you can stick the portable charger onto a window in your car, office or at home, while the integrated solar panel on the bottom will face the sun, maximizing its capability to draw solar energy and storing into built-in 1400mAh rechargeable battery, moreover, the integrated USB port allows you to charge your mobile device such as iPhone, Android phone, MP3 player and etc with ease. Apart from that, you can also charge the backup battery via mini USB input, and the LED light shows charging status.
The solar window portable charger is priced at $89.99 USD. If you’re interested, jump to The Fancy for more details.
Additionally, if you need other options, you might like to check Ray portable solar charger and more via “backup battery” tag.