No worth it,that is the solar Battery,i used it before,soon is broken.I have to buy a new one.but i think the new one is well,has a massive 8,000 mAh capacity and intelligent output control system, it can Compatible with all Apple and Android smartphones, Tablets, GoPro Cameras, MP3 Players, Mobile Gaming Devices, Bluetooth Devices, and other USB charged devices.Cell Li-polymer Battery
Battery capacity 8000mAh
Input 5 V / 2 A (max.)
Output 5 V / 2.1 A (max.)
Cycle Life 500 + Cycles
Important that offer 1 year + extra 3 months warranty for every INFINITE ONE.
I bought it 3 months, i can charge my phone 5 times at least one week,maybe you could check it in amazon.