Requires no addition of water during the life of the battery.
Y50-N18L-A3 GEL Replacement Battery for Genuine 31500-MN5-020 With 12V 4Amp Charger When a Gel Cell battery is charged, no hazardous fumes escape the battery case, gases are processed within the battery itself. The Y50-N18L-A3 GEL is a 12V 21AH GEL Maintenance Free battery. Common uses for the Y50-N18L-A3 GEL: ATVs, Motorcycles, Personal Watercraft, Jet Ski's, Snowmobiles and more.