While most smartphones and accessories have ... For just $15, you can pick up a pair of GreenEarth USB Rechargeable AA Batteries — perfect if you're experimenting with this new style of batteries.

The Panasonic eneloop BK-3HCCE/4BN Rechargeable Battery has a capacity of 2550mAh and can be used out of the box. The batteries can be recharged up to 2,100 times and they can retain up to 70% of ...