Concept Green Energy Solution Solar Assist Portable Charger

This is a good little charger, but i have one and the power button can stick and become almost unusable unless you have something like a pen to push the button down with.

Also the "solar" part of it doesn't charge the phone as quickly or as well as it should. You can pre-charge it by plugging it into a power supply or into a USB port. But it more of an external battery than a charging device. It will charge your item, but very very slowly and not enough to really matter, but will keep the battery from being at 0% too.

I have a samsung galaxy s4 so it might be that my phone is to much for it, so i don't know if it would be good on something else, like a non-smart phone. It boasts these features

Charger can be Charged Up To 500 Times
Compatible with iPad, iPhone, Tablets, Cell Phones, Digital Cameras, MP3 and Many Other Digital Devices
Standard Adapters Include Micro USB and 30-Pin Apple Adapter in a 2-in-1 Cord
USB Cable for Charging and Discharging
Provides up to 8-Hours of Talk Time, 19-Hours of Listening Time and 4-Hours of Internet Time

I have never tired it on a tablet or anything else just with my phone. So in my personal experience it is good for keeping the phone alive while you are on your way to a wall charger. I would recommend it as an emergency back up, but not as a main charging solution.