Operating fish finder using lithium battery

[wiperhunter2]

. . . after a dozen calls and visits to other local shores I have yet to find another one that can do the same test.

Have you tried 'National Battery Sales' at 1950 S 1900 W, West Haven, UT 84401, (801) 621-0010?

Yes, called them yesterday, they just got in their first lithium batteries this week and they have no testers. Since I haven't been able to find anyone locally to get a second opinion, I decided to go back to the Auto zone and talk to the guy that did the test but this time I ask to watch what he did. Sure enough they had a lithium function on their tester but as they were going through the test, one thing I noticed is the tester was only for 20 ah batteries. I guess the guy didn't notice that when he first tested it, so that threw the whole test out the window. Not sure what to do now, but I'm pulling out the on board lithium charger from the boat and seeing if something is wrong with it. I wish this was clear cut but with no one in the area that can test them i'm really not sure what I will do next but I will take Shawn up on his offer to charge the batteries, then go from there.