A dead phone is a useless phone so it’s always wise to have a backup battery somewhere in arm’s reach. For Prime Day, Anker’s PowerCore 10000 PD is just $26 ($20 off), a great deal for an emergency charger that will surely save your bacon sooner or later. The pocket-sized battery has 10,000 mAh of storage (enough to charge most smartphones twice), a USB-A and USB-C output port that can charge two devices simulatenously and has 18 watt Power Delivery output for fast charging.
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