Groupon offers the uNu Enerpak 11,000mAh Portable Battery Pack on sale for $44.99 plus free shipping.

What makes this deal hot:
You save $45.01 off the retail list price. That's the lowest price we could find currently. No tax in most states.

What this does & Why you need it:
This features compatibility with smartphones and tablets, 11,000mAh, Charges two devices at once, LED battery indicator, One-year warranty from uNu and more.