Here’s the thing with USB battery packs: They aren’t one size fits all. You wouldn’t want to carry around a 20,000mAh power supply in your back pocket during the day, but a pocket-sized model won’t cut it for long flights. Ideally, you’d own one of each, and with these deals, you can.

The 5,000mAh KMASHI is an absolute steal at $6, and the 20,000mAh Aukey includes Quick Charge 2.0 and a Lightning input port for iPhone users.


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