Battery Tender

[HiTech]

....here’s what I use on all my batteries whether is a an atv, pwc, riding mower or my motorcycle. Works great and desulfates the battery plates for longer life span
BatteryMINDer Model 2012-AGM: 12Volt-2 Amp Battery Charger Maintainer/Desulfator for Odyssey, Optima and AGM Lead-Acid Batteries - Designed for Cars, Trucks, Motorcycles, ATV, Boat, RV, etc.

Those BatteryMinders are nice chargers. We are fortunate to live in an era where hi-tech electronics removes the guesswork and effort of testing and maintaining expensive batteries.