Very practical, compact, connects with a USB charger or USB cable on pc. A small red or green LED indicates when the battery is charged. Faster reloading in the phone usb charger. Too bad, however there is not an indicator of the level of charge. Sometimes I do not know if the battery is inside is charged or not. As soon as you reconnect the LED begins red, if it is not loaded will remain so long and so the battery is charged within minutes (4/5), but you can not instantly know whether the battery is charged or No.