Eli5: Why do some devices not work with rechargeable batteries?

Question

I like to use rechargeable batteries for most of my devices and every once in a while, I come across remotes, wireless cameras, etc that will NOT work with rechargeable batteries. It’s not a charge issue because they are always fully charged when I go to put them into a new device. Why does this happen?

In: 11

Answer 1

Rechargeable batteries have slightly lower voltage thank typical alkaline batteries. That can cause issues with some devices.

ETA: Alkaline are 1.5 V, rechargeable are usually 1.2 V.