Power banks designed for phones don’t do much for laptops and tablets. But the RavPower RP-PB055 AC Power Bank packs a whopping 30,000mAh, and more than doubles a MacBook’s time between recharges.

The RAVPower Portable Charger 6700mAh Power Bank is only $10.49 with this Lightning Deal at Amazon right now! This super portable charger only weighs 4.1 oz., has fast 2A input and 2.4A output with ...