Why Lithium AA Batteries “Fail” Out of the Blue

Here’s Why Lithium AA Batteries “Fail” Out of the Blue (And What to Do About It) – By Sydney Butler How-To Geek
If you’ve put a lithium AA battery into something like a gaming controller or any device with a battery meter meant for alkaline batteries, you may notice that the batteries seem to go dead suddenly, even if the meter still showing a full battery right up to the end. Why does this happen? The answer is surprisingly simple.