Some devices are supplied without charger which requires use his computer to recharge. Others come with a charger connected to the device via a USB cable. I can not count the number of chargers that I use (tablet, smartphone, Bluetooth headsets, GPS ...) and recently a router and external batteries. The charger model RP-UC11 replaces all these chargers without worries thanks to the iSmart technology that automatically manages the need for clean energy to the device. The two USB ports are sufficient to cope with any "failures" battery. Convinced of the usefulness of such a virtually universal charger I bought the same charger to plug into a cigarette lighter RP-CC02 model.