How to Restore A Car Battery

In this article, you’ll learn how to restore a car battery:

Replacing car batteries with new ones is an expensive affair. You can save money by reconditioning your old car batteries instead. This is not as complicated as it sounds – even if you’re not a very technical person. The instructions provided in this article are fairly straightforward and easy to follow. They’ll help you save time, money and you’ll learn a useful skill – for FREE!

If your car batteries do not have enough grunt to start the automobile, they need replacing or restoration. However, if your battery has undergone physical damage, then it is best not to tamper with it and get a new. Signs of physical damage include melted plastic casing, dents in the body, burnt wires etc. The average life of a car battery is four years. If yours is older the four years – it requires restoration, especially if you have problems starting your car despite charging your batteries frequently. Also, if the battery registers a reading below 12 Volts on a Voltmeter, it has undergone sulfur corrosion and needs to be reconditioned.

Car batteries contain lead plates and acid. Over time, the plates become deposited with sulfur and this causes corrosion. The process is called sulfation. In order to restore your car battery, you’ll need: Epsom salt (magnesium sulfate), a funnel and storage container (both should be non-metallic), baking soda (not baking powder – ask for sodium bicarbonate NaHCO3), distilled water, wrench and replacement plugs (plastic). You also need a three stage battery charger – make sure that it is a charger for lead acid batteries.

How to Restore a Car Battery, Step by Step:

  • Turn off your car and allow the battery to cool for about an hour.
  • After that, lift up the hood and detach the battery – use a wrench to disconnect the negative cable first, followed by the positive cable.
  • Make sure that your wrench is not touching any other metal parts or you might experience a small jolt of electricity.
  • Once the cables have been disconnected remove the battery carefully (It is a tad heavy).
  • Now, remove the plastic caps on the top of the battery cells. Underneath, you will find marks where the cells have been sealed.
  • Use a power drill to make a hole in these marks (cover your eyes with safety glasses).

For this next bit, wear some gloves to protect your hands and empty the contents of the cell by turning the battery upside down over a storage container (non-metallic).

  • Gradually add small quantities of baking soda to the container. This neutralizes the liquid.
add small quantities of baking soda to the container. This neutralizes the liquid.
  • Repeat this procedure for all cells.
  • Cover the storage container tightly and keep it aside – you’ll need to take it to a facility where hazardous waste is disposed.
  • Now, mix one part Epsom salt into three parts of warm, distilled water.
  • You should have a quart of this solution for one cell.
  • Pour the solution into the cells, shake it around for a bit and let it sit.

Here’s how you complete the job:

  • Connect the three phase charger to the battery.
  • Make sure that it is off – connect the positive cable first and then the negative cable.
  • Set the charger to 12 Volts and switch it on. Let charge for 12 hours.
  • Cover the drilled holes with replacement plugs and place the battery back into the hood and connect it to the cables (positive first).

You have now successfully restored your battery!

How Often should I do this ?

Repeat the above-mentioned procedure every week for four weeks. This will get rid of all the sulfur deposits.

Understand that restoration is possible only if sulfution has not caused irreparable damage to the lead plates.

In some cases, there is simply too much corrosion and hence there is no point in attempting restoration. Still, it is quite common for old car batteries to be restored using the above mentioned method. So give it a try.

Here is a video to help you understand the process better:

Click here to watch the video

Want to read more on this topic? We’ve got some more amazing blog posts you’ll enjoy, check them out below:

  1. How to Fix a Dead Cell in a Car Battery

  2. What Is Battery Reconditioning?

For more Videos, Tutorials and More – Check out EZ Battery Reconditioning.