RV batteries come in both 6 volt and 12 volt sizes. Six volt batteries are generally larger than 12 volt batteries; they have thicker plates and more space per cell resulting in a deeper discharge than a 12 volt. Wiring two 6 volt batteries to create s single power source tends to last longer while doubling the voltage but not the amp hours, where wiring two 12 volt batteries together will result in double the amp hours and voltage.
The most common RV batteries are flooded deep cycle batteries, meaning that they have thicker plates that are able to discharge and recharge over and over again and are designed to last longer than regular batteries. They produce a steady amount of current over a long period of time, where car batteries are designed to produce a large amount of current for a short period of time.
RV batteries should be stored in a cool, dry place with temperatures between 0 degrees Celsius and 27 degrees Celsius. Do not allow your battery to freeze. Your RV battery should be charged before storing and checked every 90 days. Try to maintain a state of charge over 75% and recharge if necessary.
Always use skin and eye protection when cleaning your RV battery. Clean the battery terminal connections as well as the clamps that connect to them with a wire brush or toothbrush using a baking soda and warm water solution to neutralize the corrosion. Once the terminals are clean, apply a grease or petroleum jelly to them as well as the cables to slow down the formation of corrosion in the future.