I sold my Etrac almost 2 years back to tgetting to things me ex wife enjoyed. Needless to say, she is gone and I started getting the bug again. Ran across a pretty good deal on a used package deal. Only battery that came with it is the RNB with a car charger. Called RNB and they were nice enough to send me a charger. Great people to talk to. Finally got a chance to take it out and after about 20 minutes, it shut down. Powered it pack up and it worked fine for about 30 minutes and then shut down again. Noticed it said voltage overload. I ran a RNB in my other ertrac and never had a problem. It is an olde battery. I have did some searching but never found causes, just a few recommendations. So I did order a AA holder and going to run alkaline batteries in it and see if it will fix the problem. Thought I would fish for some information while I wait for the holder to come in. Nice to be back!! Thanks for any input.