How to charge a flooded car battery

A flooded car battery isn’t the end of the world but it might cause you a headache or two. Finding out how to charge a flooded car battery and then carrying out the instructions is pretty easy but remember to be safe at all times.
    wikimedia commons
Speed is important

Most vehicles have an unsealed battery which has caps on the top which are removed when you want to check the battery level. A flooded battery drains very quickly and it could die if you leave it long enough, so the first tip is to get onto your flood battery problem as soon as you can.


1) Before you recharge, check the electrolyte level in your lead acid battery. To do so, remove the refill caps and look inside. The plates should be covered by fluid. If they’re not, refill with distilled water.

2) Make sure the battery is unplugged and the switch is turned to the off position. If the battery’s still in the car, make sure the vehicle’s switched off before you begin.

3) Connect the positive clip of the charger to the + sign post on the battery. If the battery’s in a vehicle still, you must make sure you also connect the negative clip of the charger to an unpainted bolt or bracket on the engine block. Don’t connect it to the (-) on the car’s battery unless the battery has been removed from the vehicle.

4) Set the charger to 12 volts if it has a switch. Also set to low amp if there’s an option to do so. If the charger has a rate switch, choose the slowest charge as this will be more effective and ultimately better for the battery.

5) Plug the charger’s power cable into an electrical socket and allow the battery to charge. Most modern chargers have a gauge so you can follow the charging process. If not, there will be a light that indicates when the battery’s fully charged.

6) The final stage sees you switching off the charger and then disconnecting the charger and the battery.

United Kingdom - Excite Network Copyright ©1995 - 2021