Anker PowerCore II 10000 | $23 | Amazon
Anker PowerCore II 20000 | $35 | Amazon | Promo code KINJA126

Anker’s PowerCore line of battery packs have been our readers’ favorites since they debuted, and now you can save on two different sizes of its sequel, the PowerCore II.

Cosmetically, the PowerCore IIs look very similar to the original PowerCores, but with more precise eight-dot charge indicators so you know how much juice you have left. But inside, they’ve been upgraded with Anker’s new PowerIQ 2.0 charging technology, which delivers the fastest possible charging speed to your devices, including Quick Charge-compatible phones. That speed works both ways, as the entire battery will recharge in four or five hours (for the 10,000 and 20,000mAh models, respectively) if you plug them into a QC wall charger.