12V Car Charger with Dual USB Truck Motorcycle Car Battery Charger Maintainer Amp Volt Trickle Charger

Product Introduction:12V 5-7AH takes about 6 hours;12V 9AH takes about 10 hours;12V 15-17AH takes about 13-15 hours.Package List:1 * Battery Charger--------------------------Red clip is connected to battery positive.-Black clip is connected to the battery negative.-------------------------For the battery if you don't use it for long time or Lack of electrolyte, the voltage will be much lower and the battery will be easy got broken and battery will not been charged any more.