Why You May Want To Reconsider Resetting Your DeWalt Batteries

DeWalt has a terrific reputation for the quality and durability of its equipment. In fact, it's rated as the most reliable power tool brand, according to user reviews. However, even DeWalt batteries will degrade eventually. As they age, they may not charge fully, or they will drain more quickly than before. Eventually, they won't power your tools at all.

Given that DeWalt batteries are fairly expensive, it's understandable that people would rather find a way to revive them rather than simply throw them out. One suggestion is that they can be reset (or jump-started) with another battery, much like you might do with a vehicle. So why would you want to reconsider doing it? There's a possibility you could give yourself a nasty electric shock –  even worse is the risk of fire, the release of toxic chemicals, or that the battery could explode. 

The method seems relatively straightforward, needing nothing more than a couple of wires. Indeed, there are online sources that offer plenty of advice on how-to, and it could certainly save you money. But, despite the popularity of this hack, there's no way around it: it's actually quite dangerous. Let's examine the potential issues with this hack and explore alternative solutions.

The resetting (or jump-starting) method uses two wires to connect terminals from the dead battery to one that holds a greater charge, allowing some of that charge to be transferred. Apart from the danger of shock, the timing of this method has to be carefully controlled, and experts warn it should only be attempted by professionals.

Any errors will likely damage the battery, but if it wasn't working anyway, it might seem worth trying. However, the greater hazard is the potential for overheating. The cells inside can then become part of an uncontrolled chain reaction called 'thermal runaway' that results in either a fire or an explosion that also releases poisonous gases. Fires can be intense and difficult to extinguish, so it's recommended to call emergency services rather than trying to put them out yourself.

One of the mistakes that can shorten the life of your power tool batteries is allowing them to drain completely before recharging, but eventual decline is unavoidable, so hacks to bring them back to life are tempting. Nevertheless, the bottom line is that trying to reset DeWalt batteries, or those from other brands, poses very real risks to people and property. It's not all bad news. While every power tool battery will fail eventually, simple steps like removing them before storage, storing them in a cool location away from sunlight, and avoiding overcharging can go a long way in extending their lifespan. Unlike resetting, these tips won't endanger you or your family either.