Rechargeable batteries can theoretically save you a fortune over disposable ones, but they’re still prone to the same loss of power over time.
Not all batteries get used all the time. While the AA batteries in your wall clock, home security camera, or TV remote may get a daily workout, other battery-powered items like flashlights, drones, and game controllers could go weeks or months without being called into service. If you use rechargeable batteries, you probably have a stock of them in your home ready to pop into various gadgets when you want to use them. You’ve also probably wondered what happens to rechargeable batteries when they’re not being used. Do they hold their charge, or does the battery life drain away while they’re inactive?
As with most things in life, it depends. All batteries will lose some charge even when not being used. It’s known as self-discharge, and it’s just part of the lifecycle of a battery. How quickly they do this is mostly down to the type of rechargeable AA battery you’re using. The brand of battery can also make a difference, and they’ll discharge quicker if they’re not stored correctly. Let’s look at which batteries perform best and how to help them keep their charge for longer.Which batteries hold their charge the longest?
There are three main kinds of rechargeable batteries: nickel-metal hydride (NiMH), Low Self Discharge NiMH, and Lithium-ion (Li-ion).
