![]() They would last for around 1,000 charges in total, depending on how you used them. ![]() These are the oldest batteries that are relatively cheap to buy, and are becoming less popular. There are essentially three types of rechargeable batteries: 1. Older rechargeable batteries would wear out completely after around 1,000 charges, but more modern rechargeable batteries have a higher capacity and can be fully charged for 1,000 cycles before they even start to lose overall capacity. Divide that by the power draw of the flashlight and you get 4.8 hours of usage. A flashlight using 6 batteries would therefore have 6 x 2400 mAh, which is 14,400 mAh or 14.4 amps. The way you work it out is you look at the power draw of the device, and the total power of the batteries. This is referred to as self-discharge, where the battery loses power even when it’s not being used, or it’ll lose more charge than the device it’s powering actually needs.Īgain, there’s no clear percentage of how much worse rechargeable batteries are compared to disposable ones since battery capacities, types, and even quality vary so much.īut to return to the original question – how long does a rechargeable battery last per charge – you can work that out based on the total capacity of the battery and the power draw of the device you’re using it with.įor example, these Amazon Basics Rechargeable AA batteries have a 2400 mAh capacity, so a typical flashlight that uses 6 of these batteries and draws 3 amps of power would last for just under 5 hours. But rechargeable batteries will normally last slightly less than regular alkaline batteries due to power leakage. It depends on the battery capacity, and what it is being used for. There is no simple answer for how long rechargeable batteries last per charge. How long do rechargeable batteries last per charge? But how do they compare with regular batteries, and how long will they last before you need to buy more? Let’s take a look.
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