[WindowsCentral.com]

Sometimes you just need some extra juice to keep your phone or another device powered through a long day. Luckily, the Mpow 20000mAh Portable Charger drops to just $14.99 at Amazon when you clip the on-page coupon and enter promo code VBUTA9GB during checkout. It regularly sells for $31, so you're saving over half with this deal.
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This power bank's capacity is enough to charge an iPhone X five times and a Samsung Galaxy S9 more the 4 times over. It's slim and light so you can throw it in a bag or purse without much extra bulk and it has two USB ports so you can share the juice with a friend in need. It has built-in protections against over-heating, over-voltage, over-current, and over-charging, and it's backed by a 2-year warranty.

Full story from the WindowsCentral blog...