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“Being a not-so-careful person, this became an essential for me. I don’t always remember to charge my phone fully before a hike/outing, yet I hate for it to die since I use it for photos. Enter a battery charger. The Anker can easily take my phone from 0% to 100, with plenty of charge remaining. You can use it to charge whatever USB device you need. It can literally be a life saver if you get lost and still have service and can’t call for help with a dead phone.”