There isn't one test to tell you everything about a battery,
The voltage alone doesn't mean everything. The charging rate doesn't mean everything. Leave charger on until it auto shuts off. Then use a hydrometer,
You can get a very good hydrometer from NAPA with a built in thermometer. If all hydrometer readings aren't the same, a good chance you have a bad cell. A carbon load tester will also tell you if the battery can produce the amps. I like using my Midtrontics meter, It measures volts and estimated current capability. 99% of the time the midtrontics meter can tell me instantly if I have a bad cell and the battery is junk. Some new smart chargers won't charge if you have a bad battery too. NO battery likes cold temps. The colder it gets the less they like to take a charger. My car has a built in voltmeter. When I have very cold temps, the alternator will produce 15.5 vdc. Not sure if all cars will produce that high of charging voltage. My car has a huge AGM battery because the engine turns off at stoplights.
Warm your battery, charge it, then after it sits for a day or so, measure with hydrometer and voltmeter.
Measuring voltage as soon as you take it off the charger is meaning less, unless the voltage is below 12v.. All you are doing is measuring surface charge. I have a carbon load tester, hydrometer and midtrontics volt meter and estimates current amps. I Can't use hydrometer on AGMs
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.