The Schumacher SC-8000A Speedcharger Battery Starter, Tester and Charger comes with a self-adjusting system so you can have a variable charge for all your battery needs. This multi-amp charger, starter and tester provides 80 amps for start up, 12 to 30 amps for normal charging and 2 "trickle" amps for charging and maintaining smaller batteries. The Schumacher Speedcharger Battery Charger will automatically charge and desulfate any type of battery to maintain them in peak condition.