This portable automotive battery charger has three modes, making it easy to charge, maintain or jumpstart 12-24 volt batteries BC-50 Use this car battery charger/jumpstarter to bring drained batteries back to life and keep them charged. This engine starter doubles as a trickle charger.This portable automotive battery charger has three modes, making it easy to charge, maintain or jumpstart 12-24 volt batteries BC-50 Use this car battery charger/jumpstarter to bring drained batteries back to life and keep them charged. This engine starter doubles as a trickle charger.This portable automotive battery charger has three modes, making it easy to charge, maintain or jumpstart 12-24 volt batteries BC-50 Use this car battery charger/jumpstarter to bring drained batteries back to life and keep them charged. This engine starter doubles as a trickle charger.This portable automotive battery charger has three modes, making it easy to charge, maintain or jumpstart 12-24 volt batteries BC-50 Use this car battery charger/jumpstarter to bring drained batteries back to life and keep them charged. This engine starter doubles as a trickle charger.