Not Ranked
I have used the Deltran Battery Tenders on 3 cars for years and no problems. I do have my disconnect switch on the Negative side of the battery in the 69 Cobra and I had to replace that battery last summer and it was 14 years old.
awfink55s suggestion of disconnecting the battery completely and seeing if it happens is a good one. If the battery is over charging, then something is causing the tender/charger to try to charge it. Possible a small short somewhere in the cable or something is drawing a little current all the time.
Ron
|