Stay charged up with the RAVPower portable power bank on sale for $24

[iMore.com]

Includes two iSmart 2.0 ports that can detect the device being plugged in and provide the fastest possible charge with up to 5V/2.4a output per port. Recharges back to full in nine to ten hours. Has built-in protections from overheating or surges.

Full story from the iMore Blog...