Keep your smartphone charged for cheap with Amazon's one-day power bank sale

It’s a great day for powering up your mobile life. Amazon is throwing a one-day sale on RavPower power banks and chargersRemove non-product link. The sale isn’t particularly big, with only five items included, but if you need a mobile battery with a whole lot of charging ports then today’s a good day to get one for cheap. Here are our top three picks from the sale, which ends just before midnight Pacific time.To read this article in full, please click here