Brookstone is offering this Rechargeable Backup Battery for Smartphones, Cell Phones & Cameras for $39.99 plus extra shipping. Expires soon.

Why this deal is hot:
You save $10 off the retail price of this item. This is the best deal found on this backup battery.

Features the ability to give you three complete charges before it needs to be recharged again, easily portable, includes USB cable and AC adapter, for use with devices that are charged via mini-USB port.