VMAXTANKS BC1204 12V 3.3 Amp 4-Stage Smart Battery Charger and Maintainer 7Ah-60Ah AGM, GEL or SLA 12 Volt Battery Charger LED indicator lights show charging status and battery level 4-Stage Microprocessor Controlled Battery Smart Charger / Maintainer Easy to use, plug it in and forget it! Battery Charger / Maintainer / Tender