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How long is the warranty on a head lamp or flashlight battery?

Many lights come with a five year warranty on material and production flaws. This, however, only applies to light and not to the battery. Batteries namely only come with a one-year warranty; because of the statutory warranty period, however, Knivesandtools extends this warranty with one additional year. As such the battery is covered by a two-year warranty.

How long a battery lasts depends on a couple of things. On average you can charge a Li-Ion battery 500 times, after which you need to purchase a new one. How you use the battery, however, also affects the life of the battery. If you don't use it for a certain amount of time, if you overcharge it in a bad charger or if you store it in a hold or cold environment. In case of warranty it is also key that you can prove that the defect was caused by a material or production flaw.

Remove the batteries from the light
or loosen the back

How do you extend the life of the battery?

To improve the life of the batteries there are a few things you can do! If you use alkaline batteries we recommend removing them from the flashlight if you don’t intend to use it for a while. These batteries can namely start to leak. The alkaline liquid strongly affects aluminium. The result is that the switch breaks down and the batteries get stuck inside the body. The light can no longer be repaired and the warranty - on both the light and the batteries - is void in its entirety.

With other batteries you have two options. Remove the batteries or loosen the back of the light. Even if you don't use the light it will retrieve power from the battery. As such the battery will not only be dead in time it will also be too deeply discharged. By officially breaking this connection you solve this problem. Do you prefer removing the batteries from the light? Please make sure the poles don't come into contact with each other. You should also always store your batteries at room temperature. Hot and cold temperatures will cause the voltage to slowly decrease.

With Li-Ion batteries some people sometimes say: 'I take good care of my batteries, I charge them as little as possible!' With these types of batteries, however, this could have the wrong effect. As such you should charge and use them regularly. The result is that you can use your batteries for years to come!