The BlackBerry C-Series External Battery Charger lets you charge an extra battery from a wall outlet or via USB connection. Sometimes, even carrying an extra battery isn't enough and the BlackBerry C-Series External Battery Charger will keep you powered up. The external battery charger works with your home/travel charger (not included) for charging from a wall outlet or with your USB cable (not included) for charging from a computer. Convenient compact size lets you take it along to work or for traveling. The BlackBerry C-Series External Battery Charger is compatible with all OEM C-series batteries (including C-M2, C-S2 and C-X2) and aftermarket batteries used in BlackBerry phones.