Battery goes dead

[teddybaham]

Yea my 08 f250 had to warranty 2 sets of interstate batts. then burn up an alternator when a cold front killed one overnight. interstate said there was an issue with my truck..... i put Walmart batteries in the Ford and they've been good for years. this Interstate batt came with the tractor and still had full replacement warranty so i replaced it with another, but I'll never purchase an interstate battery again. ill give credit where credits due its testing higher than the CCA rating of 950, but i have no bassis on whether or not the Amazon batt tester is 100% accurtate. if you can get your hands on a Deka type 31 that would be my 1st choice, my local battery shop has them for $131 and the AGM for $289. Napa/Autozone/ O'reileys have the type 31 battery for about $180. Walmart dont carry a type 31 battery or i would have explored them too. I've had great results with Deka in my atvs utvs

 

[ultrarunner]

My longest lasting ever battery is Deka

 

[teddybaham]

allegedly made in PA

 

[teddybaham]

no update?

 

[Dave.S]

Took the alternator wire off and test light went dim, so i removed the alt and took off the plastic cover.
found some rust on some of the screws for the brushes and connections. cleaned it up and also found insulation on a (guessing a heat sink) brittle
so I covered the wire with electrical tape. heat sink goes to the lower brush and then the brittle wire goes to an electrical connection.
Put all back together, and the test light only had the dim draw and put the - cable back on the new battery I put in. before taking off the alt. it would only charge at a slow rate and took about 5 minutes to get to just about 14 volt charging. after cleaning and reinstalling It charged quickly but went up to 25 volts and still climbing when I shut it down. will be installing a new alt. and I let you know.
By the way the alternator was hot to the touch and much hotter than any surrounding metal, so I think it has a short inside of it. Also on the plastic rear cover it says fuse inside, anyone know what it looks like? It is a Lucus alternator.