To test, disconnect the battery and check the resistance with your meter probes connected [contacting] the Pos & Neg cables. Should be Zero; 0.000.
Then it just quit when I stopped at the post office that's about three miles from the house
I used them on both of my cars this year. When it came time to start them up, they both cranked without issue.
Cheap insurance, last year I had a battery freeze in the cold weather, of course that is not covered under warranty. I figure the $40 it cost for a tender will save me a couple hundred in the long run.
OH yeah, I have the small one. Battery Tender junior 12v
Wow, that must have been really cold to freeze the acid in a battery. Will a tender prevent that?
Jack
I had a CTEK on the Optima in my car trailer and for whatever reason it vented the top of my battery. After that I bought a Battery Tender Jr for one of my other cars. It seems to work well and is very cost effective.
http://www.summitracing.com/parts/dtn-021-0123/overview/
Wow, that must have been really cold to freeze the acid in a battery. Will a tender prevent that?
Jack