How to Restore Deep Cycle Batteries

Deep Cycle Batteries are found in boats and golf carts.

Typically used in golf carts and boats, deep-cycle batteries are designed to provide a steady current over long periods of time. They differ significantly from car batteries, which release a high level of current over a short period of time before recharging. Restoring deep-cycle batteries is not a difficult task.

Things You'll Need

• Battery charger
• Electrical outlet (if applicable)

Instructions

1. Discharge the battery fully by running the vehicle in an idle position until it dies, or turn on lights or other electrical equipment until the battery is dead. The goal is to discharge the battery completely .

2. 

   Use a battery charger to recharge the battery to its full capacity. Typically, you should put the battery into--or connect the battery via cables to--the charger, then plug in the charger. If the charger is portable, then it does not need to be plugged in. It all depends on what type of battery you have. Sometimes you can leave the battery in the vehicle and just connect the charger, or you have to take it out and put it into a charger.

3. Remove the battery from the charger for 24 to 48 hours. This gives the battery a chance to rest and discharge a little bit without being in use.

4. Charge the battery again by following the instructions in Step 2.

5. 

   Repeat at least one more time, and ideally as many as five times total, to ensure that the battery is completely charged.

Tips & Warnings

• Read your owner's manual to find out if you need an electrical outlet for your battery or if there is a self-charging device within the vehicle. Chargers can be purchased from the manufacturer of your vehicle.

• Inspect your batteries on a regular basis. Make sure the casing is not cracked at all. If it is, throw the battery away immediately to avoid injury and possible explosion.

References

• How to Restore and Prolong Lead-Acid Batteries
• Car and Deep Cycle Battery FAQ
• Marine Battery Solution