Multi Stage 6V and 12V Smart charger and maintenance charger. Smart charger capable of charging lead acid (Gel Silver/Calcium AGM & EFB stop/start) batteries up to 70Ah. Multistage charging extends the life & performance of modern battery types. Safe to charge without disconnecting battery from the vehicle. Protection for vehicle electronics including polarity reversal short circuit & overvoltage. Optimised maintenance charging means unit can be left safely plugged in indefinitely e.g. maintain car in storage. Can maintain batteries with up to 130Ah capacity. Auto restart function resumes charging at the last used settings in event of a power cut.