Worried about running out of power on your next long flight With this Black CP-ELS portable USB charger from Sony, you"ll always have a backup power source on hand should you need it. Simply plug the modular charger into your PC"s USB input to collect a charge. When it"s finished charging, just unplug and go. When you need a battery boost on the run, plug your phone or MP3 player into the portable charger via micro USB and recharge your device. Recharge your smartphone, MP3 player, digital camera or other device with one convenient charger that"s small enough to take anywhere.