As one of its daily deals, 1Sale offers the MyBolt 2,600mAh Portable USB 2.0 Flash Charger 2-Pack in Black, Silver, or Pink for $14.99 with free shipping. That's the lowest total price we could find for two such chargers for $5. Each adds up to 40 extra hours of battery life to most smartphones, eBook readers, and tablets. Deal ends today.

Note that this order will take one to two weeks to ship.