Electrics & Electronics: Electrical Principles: Battery maintenance procedures
Inspecting & testing a battery
 
Batteries come in many sizes and power ratings, so always check the rating of the battery you are servicing.
 
Cleaning & replacing a battery
 
If replacing a smaller battery with a larger one, replace the restraining device and tray used to secure the new battery.
 
Charging a battery Slow charging a battery is less stressful on a battery than fast charging is.