Yuasa YUA1202040 MB-2040 Shop Battery Charger Charges both conventional (flooded) and sealed (VRLA) Powersports batteries Up to 20 Volts aids in recovering deeply discharged "sulfated" batteries Diagnosis function advises if battery is damaged and will not take a charge, and alerts if charger is attached in reverse to the battery "Normal mode" for smaller batteries, initial activation and deeply discharged batteries "Quick mode" for quick vehicle set-up