How To Recondition Batteries Is A Powerful DIY Skill

Batteries are expensive. If you love saving money like we do then you’ll want to know how to recondition batteries.

It doesn’t matter whether you’ve got a smartphone you’re thinking about throwing out, an electric scooter, or an electric bike or any other electronic device, it almost certainly has a battery in it.

And you’d be amazed at how easy it is to recondition these batteries to work again without throwing them away or replacing them. 

How To Recondition A Hybrid Car Battery

This is the easiest kind of battery to recondition.

Hybrid car batteries are complicated and they aren’t “a battery” but rather a series of modules.

When they go wrong, you don’t need to replace the battery (cost of $3,000 or more) but rather the broken module (around $500-$750). 

So, make sure your mechanic is aware of your know-how and get them to specify the broken module in the repair shop. 

How To Recondition A Car Battery

This is pretty easy too.

Get some distilled water, a battery charger, a syringe and a voltmeter

car battery


  • Disconnect and remove the battery. Remove any protective cover and all the caps that are present.
  • Add distilled water to the battery and place it on charge for an hour. Look for bubbles appearing in the holes.
  • No bubbles? Change the polarity from one side of the battery to the other and run for another 30 minutes.
  • Check the charge with the voltmeter. 

How To Recondition A Laptop Battery

There are quite a few different ways that you can recondition a laptop battery.

The easiest (if your battery isn’t leaking) is:

  • Remove the battery from the laptop.
  • Put the battery in a freezer bag.
  • Put it in the freezer for 12 hours.
  • Remove from the freezer.
  • Wipe the battery clean. 
  • Put the battery in the laptop.
  • Recharge. 

If that doesn’t work, you may need to “reset” your laptop battery and you can do this, instead:

  • Charge the battery to 100%
  • Leave the laptop alone for 3 hours
  • Unplug the laptop and leave the battery to run down to 0% (turn off any battery management in the computer)
  • Leave it for 5 hours
  • Then recharge the battery to 100%

How To Recondition NiCad Batteries

Nickel-Cadmium or NiCad batteries can also be reconditioned. 

However, to do so, you’ll need the capacitor which is found on the flash of a camera.

To get that you’ll need to buy a cheap camera (say on eBay) and remove the capacitor – this will permanently trash the flash, so, don’t buy anything expensive. 

nicad battery

Then you’ll need a battery holder and a switch which you attach to the capacitor. 

You connect the battery holder to via the switch with a couple of wires. 

Then check to make sure that your wires are fully insulated. 

Now pop an alkaline battery into your capacitor and the NiCad battery into the holder.

Turn it on and wait. 

If you hear a noise that’s normal and it means that the process is working to destroy the chemical build up inside the NiCad battery.

When the LED glows, take it out and test it. 

Repeat as necessary. 

Final Thoughts On How To Recondition Batteries

Everyone should know how to recondition batteries. Not only is it kind to the environment but it’s also kind to your wallet. 

That makes it the perfect kind of skill to enhance all of our lives. 

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