Here's Why Lithium AA Batteries "Fail" Out of the Blue (And What to Do About It)

Why does this happen?

The answer is surprisingly simple.

Both types of battery will provide the correct voltage range for those devices.

AA batteries are usually in the 1.2V to 1.5V range, depending on the exact battery chemistry.

For example, Nickel-Cadmium (NiCd) batteries have a nominal voltage of 1.2V and alkaline batteries have 1.5V.

An alkaline battery has a gradual and predictable drop as it discharges.

For example, a10-year sealed battery smoke detectorknows exactly when its battery is about to die.

If you use them on a gear with no battery meter, it’s no big deal.