Deltran battery tender is perfect for all lead-acid, flooded, or sealed maintenance-free batteries (AGM and gel cell).• Switchable from 6 Volts or 12 Volts DC @ 1.25 amps• Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode)• Listed in California Appliance Efficiency Database Complete 4-step charging program | Battery Tender Charger, Battery Tender Plus