Has anyone found where to buy 2.5 Volt battery's

[kc0cmp]

If you thought shorting out a lithium ion battery was bad, try it with a supercap. I've seen screwdriver tips (the tool, not the pv) blown completely off shorting a capacitor.

I used to short caps all the time before working on linear amplifiers. they do chew bites out of your screwdrivers lol, I started buying walmart ice picks to save my screwdrivers after a while

 

[SLDS181]

I have seen 5 Volt battery's, they are used for medical devices, and are very expensive.

Thats a battery pack. It consists of multiple batteries, and a regulator.

Precisely what has been said in this thread repeatedly.