Can You Rebuild Or Refurbish Harbor Freight Batteries?

If you're a DIYer working on a budget, you're probably doing everything you can to save money on power tools. You might be doing the same thing with power tool batteries, which can be expensive to replace. But before you try to save your Harbor Freight batteries, which already have some common problems, beware that the company advises not to modify or repair them. Batteries such as the  Bauer 20V Hypermax Lithium battery, Warrior 18V 1.5ah battery, and Hercules 12V/20V Lithium-ion battery fast charger all come with a warning not to open, as it could lead to an explosion. 

The problem with trying to do this yourself is that Lithium-ion batteries contain flammable electrolytes, and the batteries themselves store a lot of energy. Because of this, mishandling them in any way, including opening them to refurbish them, can lead to toxic chemical exposure or fire. Plus, if you damage a battery from Harbor Freight while attempting to repair it, you'll likely lose any warranty you have. Either way, it's not worth the risk.

If you're really attached to your Harbor Freight batteries and want to bring them back to life, you can use a company like Battery Warehouse. Based in Lancaster, Pennsylvania, Battery Warehouse will rebuild your batteries and give you a 6-month warranty that only covers workmanship, not capacity loss. But if you go this route, you could spend more money than you'd like. In the end, it might make more sense to just buy a new battery.

The best way to ensure your Harbor Freight batteries stand the test of time is to properly maintain them. It starts with charging, as you should always use the right charger for the brands you have, like Hercules and Bauer, which are not interchangeable. Also, don't use a charger that's suited to a different voltage from your battery. Always charge in a well-ventilated area, and keep it away from flammable materials. Monitor your battery as it charges, and when it's done, remove the battery so it doesn't overcharge.

But it's not enough to properly charge your batteries, as storage can impact their life expectancy too. Your Harbor Freight batteries should be kept in a cool, dry place, away from metal objects that could potentially spark a short circuit. This means tossing batteries into a toolbox is not a great idea. Once you safely store your Lithium-ion batteries, be sure the temperature doesn't go above 140 degrees Fahrenheit, as too much heat can reduce a battery's lifespan. Plus, keep your batteries away from moisture, as that can cause damage too.

Whether you're storing your Harbor Freight batteries for a few days or longer, always inspect them before you begin working. If you see signs of deterioration or damage, don't use them. If you do, you're risking injury from fire or even an explosion. The best thing to do is contact your local Harbor Freight location or visit their website for more information.