12V Car Battery Charger,12V Lead Acid Battery Charger For SLA AGM GEL VRLA Charge Mode 4 stages MCU Control Charging & Recovery: automatically recover the battery during charging process Dual Function: Battery Charger & Maintainer Easy Use: multi indicator lights to help you use it Polarity & Overcharge Protection Suit Battery: 12V 3.3A /2 to 90Ah SLA,AGM,GEL,VRLA battery type