Battery maintenance is an important part of maintaining a well functioning piece of equipment. The lead acid battery is the powerhouse, any issues that come up in regards to the battery will effect functions throughout the entire machine.
In order to maintain a lead acid battery effectively the battery should be clean. Cable connections need to be clean and tightened. It is very common that many battery problems are caused by dirty and loose connections.
Serviceable batteries need to have the fluid level checked regularly and only at a full charge as the fluid level will always be higher at a full charge.
Use distilled water to refill the battery, tap water is loaded with chemicals and minerals that are harmful to a battery and should be avoided. Make sure not to overfill battery cells especially in warmer weather, the natural fluid expansion in hot weather will push excess electrolytes from the battery.