Posted by JDEM on May 18, 2019 at 09:54:50 from (47.33.231.52):
The question was asked yesterday about a source for low price batteries for our older tractors.
I have been using Walmart short-warranty batteries for years. GREAT value I have yet to see any store in my area come close to this deal (northern Michigan).
I have compared these batteries side by side. I have weighed them. I have load-tested them. NO difference I can find with low price versus higher price models except for warranty.
I just checked the type 26 battery in my John Deere diesel backhoe and it is 6 years old. I just load-tested it and it checks exactly the same as a brand new one I just got for my Ford Jubilee.
I find claims of "cold cranking amps" to be kind of meaningless. I wish all batteries were rated in amp-hours or reserve-capacity which has more meaning in the real world. Especially in old tractors that often have small low compression engines with low cranking amp demands.
I have yet to find a battery warranty worth the price I have to pay for it. I wonder why some other companies don't try selling batteries minus the expensive long "sort of" warranties?
I checked actual starter motor amp draw at 50 degrees F today. 300B John Deere diesel backhoe. It cranks at 210 amps @ 9.8 volts. Obviously if it was zero degrees outside the amps would be higher. Not an issue for many of us. The Walmart type 26 battery I paid less then $50 for six years ago? Puts out 300 amps at over 11 volts for at least 15 seconds. I cannot test any longer then that because my load-tester overheats and shuts itself off. Much more then enough for my diesel tractor.
I guess if I had a diesel log skidder sitting in the woods with no block heater that I had to start at below zero F temps? Yes, then I think I'd want to find the highest rated batteries I could squeeze in. But for many if not most of us with old farm tractors?
I also test the amp draw on my 134 cube gas engine Ford Jubilee. With a 12 volt battery (6 volt start) it cranks at a steady 160 amps @ 10 volts. Again, the cheap Walmart $49 battery is more then enough.
So here are some actual tests. High science? No. Good enough to give some real-world facts though.
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