PEAK PKC0CV 4/10/20/40 Amp Intelligent Battery Charger Micro processor controlled 4 stage charging process Soft start feature allows for safer charging start up Selectable charge rate for all types of 12V lead acid batteries Reverse polarity, over temperature protection, over voltage protection 4A float mode, 10 amp, 20 amp, and 40 amp charging options for faster charge and ETL