BC1220 VMAX 20Amp 7-Stage 12-Volt Microprocessor Controlled Fully Automatic"Smart" Battery Charger/Tender/ Maintainer for 12 Volt Gel Battery 20 Amperes Smart Charger for any 12 Volt AGM, Gel, SLA or Wet(FLA) batteries. Charges and maintains any lead-acid battery from 40Ah-300Ah Float Voltage: 13.8V with Pulse Feature The VMAX BC1220 utilizes the latest technology in AGM, Gel and flooded lead-acid MC (Microprocessor Controlled) battery charging The BC1220 is ideal for use with 60-350AH batteries (4-15hr est. charging time), yet capable of charging up to 300AH batteries in 24 hours Fully Automatic Smart AGM/GEL/SLA 20 Amp 7-Stage 12V Battery Charger. Charges, maintains, and reconditions your battery