Schumacher SC-300A Speedcharge 3 Amp Charger/Maintainer
This speedcharge charger is fully automatic, compact, and has a quick harness with 3 connectors. It provides a 3-amp trickle for 12-volt batteries and also features a reverse hook up protection so as not to charge the battery until it is hooked up to the correct posts.  It is ideal for small motorcycle, ATV, snowmobile, and lawn tractor batteries.