What is UP with this-- in the last month I have had three different electronic devices appear to die on me, only to find they had "dead" batteries.... then, come to find, they aren't dead at all!

Pattern-- device turns on and appears to be ready to go, then shuts self off, sometimes as soon as a key/button is pressed. Repeat-- same effect, ad nauseam.

OK, change the batteries, try again-- presto!

But then if you test the batteries, you find there is a LOT of juice left-- like 90%!!! Runs a flashlight, or a remote, just fine.

Is this a conspiracy, or does it actually protect the devices?

~Susan