Prolix 7800mAh Portable High Capacity Dual-Port External Battery Pack Power Bank Back up Charger (Black/Blue)

Bulky

1. The MicroUSB port broke within 3 weeks.2. I couldn't charge my Sena SMH10R. Apparently the Sena doesn't draw enough power from the Prolix to keep the Prolix on.The problem charging the Sena might be a unique issue, as most people will use the device to charge mobile phones, but the broken MicroUSB makes this product undependable and a bad purchase choice when there are so many other options available.

these things are awsome

I was good until about 3 months of use it wouldn't even turn on or charge

Grate product will buy again

very happy with the capacity and seems to be good quality.

It's very powerfull

This charger works really well. It takes quite a while to recharge, but then again, it provides 3-4 full charges for my phone before I have to plug it in.