Nothing can drive a person crazy quite like rationing a dwindling smartphone battery. Watching those percentage points chipped away in real time can add an added dimension of anxiety to long commutes, plane rides, and GPS-powered road trips.
This is where portable chargers come in. Not all chargers are created equal, obviously, but the Anker PowerCore 20100 ($26.99 for Amazon Prime members, today only) is 20,000 mAhs of high-capacity smartphone juice.
In fact, according to Anker, iPhone 6s users can expect to squeeze up to seven charges out of the PowerCore 20100, and Samsung Galaxy S6 users can expect up to five charges.
The 66% discount on the Anker PowerCore is only redeemable if you're an Amazon Prime member, and you might want to hurry, because after today the offer's as dead as your smartphone when you're stuck at the airport.
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