Power 2000 ACD-317 Lithium Ion (Li-ion) Battery - Replacement for Olympus LI-70B

hi welcome back to the breadboard and today we're gonna look at something if you get one of those days when you go to do a job when you want a little cut up using your Dremel battery-powered you turn it on and absolutely nothing so you slam the battery in the charger wait a little while and still absolutely nothing so what I have here is a dremel 10.8 volt lithium ion battery pack and basically one of the packs has failed so I have another one here which is still fine I keep these out in the garage normally so they do get cold on occasion have I put this one in you can hear works just fine this one that's been on the charger doesn't want to do squat so we're going to have a look at what's wrong with a battery pack and how we can fix it if we can fix it all right so let's get to the bench have a closer look and we'll see what we can find so here's the two standard battery packs I've got