Refurbished Car Batteries: What You Need To Know

Reviewed by

Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on June 24th, 2024

Reading Time: 4 minutes
Summary
  • As a battery ages, it begins to discharge in a chemical process called sulfation. A discharged battery takes longer to charge, retains less charge, and loses charge faster. A refurbished car battery is an older car battery that’s been revived from this sad state.
  • Refurbished car batteries are cheaper than brand-new car batteries, have a smaller environmental impact than regularly replacing your car battery with a new one, and they’re more readily available for vintage vehicles.
  • While refurbished car batteries have longer lives overall, their lifespan between charges is shorter than the lifespan of a brand new battery. If you don’t buy from a trusted refurbishing store, you might also end up with a battery with a damaged casing.

A new battery can be quite pricey, which is why many drivers are now considering installing refurbished car batteries instead. But are these batteries safe to use? Let’s take a look at  refurbished car batteries and their benefits and drawbacks.

Caution: Always wear eye protection whenever you’re working around any car battery.

What Are Refurbished Car Batteries?

As a battery ages, it begins to discharge in a chemical process called sulfation. Sulfate crystals start to form around the battery plates, and the battery begins to take longer to charge, retain less charge, and lose charge faster.

Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.

Pro Tip: When fast charging (if you have a fast charger, which can be expensive), if the charge voltage goes above 15.6 volts after about 3 minutes, the battery is sulfated.

A refurbished car battery is an older car battery that has hopefully been de-sulfated to an extent.

Refurbishing a car battery, also known as reconditioning a car battery, clears away the sulfate crystals while also replenishing the battery’s electrolyte solution. This process rejuvenates the battery, returning it to peak efficiency. Refurbishing a car battery can be done at home, but you need some specialized tools, protective gear, and some household items like baking soda and epsom salt. It’s a time-consuming process that involves cleaning the battery terminals and battery cells, formulating a new battery cell solution, and replacing the old cell solution with the new cell solution. Refurbishing a battery can extend its lifespan past the usual three to five years.

Ultimately, if you aren’t confident in your DIY skills, it’s best to bring the discharged battery to a battery refurbishing store or leave the refurbishing to a trusted mechanic.

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Benefits and Drawbacks of Refurbished Batteries

So if old batteries are as good as new ones once refurbished, why doesn’t everyone refurbish their old car batteries? Here are the benefits and drawbacks of refurbished batteries.

Benefits

First of all, a professionally refurbished car battery can last longer than a new battery in the long run. Refurbishing a battery means resetting the clock in a way. Instead of throwing out your car battery every time it dies, you can keep bringing it to a professional recharge station. As expected, this has a positive impact on the environment.

Refurbished car batteries are also cheaper than new batteries. Plus, if you have a more vintage vehicle, it might be easier to find a refurbished battery that fits instead of a brand-new one.

Drawbacks

Now for the drawbacks. While refurbished car batteries have longer lives overall, their lifespan between charges is shorter than the lifespan of a brand new battery. If you don’t buy from a trusted refurbishing store, you might also end up with a battery with a damaged casing. This is dangerous, as battery fluid can leak out of a damaged casing, leading to further car damage.

Should You Make or Use Refurbished Batteries?

The question of whether you should use refurbished batteries or not is a bit controversial. Some say the reduced environmental impact is worth it, while others claim that it’s too risky. There are a few situations when you absolutely should not refurbish a car battery, including the following examples:

  • If you or the car battery refurbishing store doesn’t have the right tools
  • When the battery’s already been refurbished or reconditioned three or more times
  • When the battery’s damaged

Refurbishing a battery under these circumstances is simply not a good idea. Have a trusted battery refurbishing store refurbish your battery when it’s only able to retain 60% to 70% of its charge. They’ll be able to tell if the battery is salvageable or not.

In the end, it’s up to you whether or not you’re willing to use a refurbished battery. It will save you money and help reduce the environmental impact from car batteries. But these refurbished batteries do have their drawbacks. Be sure to only buy from a trusted refurbishing store so that the risks are much lower. Now that you know more about refurbished car batteries, you’ll be able to make an informed decision.

Reviewed By Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Written By CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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Published by
CarParts.com Research Team and Richard McCuistian, ASE Certified Master Automobile Technician
Tags: battery