Remove all jewelry before servicing the battery. A watch or ring touching a battery post may cause an explosive spark or burn. Be sure to wash your hands with soap and water after handling a battery. This will help neutralize any acid you may have come into contact with. Never place tools on top of the battery.
Tools can cause a short across battery posts or cables.
Many batteries are labeled as maintenance free, but are actually serviceable. You should check the electrolyte level and add fluid, if needed. Keeping Your Battery Case Clean The simplest maintenance procedure you can perform is keeping the battery case clean. Dirt and residue can actually cause a current drain on the battery. Clean the battery case by wiping it with moist paper towels and mild detergent.