asinrutee
Active Member
Can anyone explain this. I changed a battery a 9v PP3 in my caravan alarm. I put the old battery in my coat pocket. When I got home I put my car key in the same pocket and hung it up in the hall. When I put my coat back on 4 hours later the car key and the battery were both hot not warm but hot, I guess some kind of reaction between the battery and the key but why.