I've been charging my tm batteries for several days and can't seem to get them fully charged. Water levels are good. Voltage meter is reading 12.1 on one of them and 12.5 on the other. I think I've been running them for three seasons. Have they simply lost their ability to reach a full charge or could something else be at play here. I thought I would post the question before simply going and replacing them. Important outing this weekend and everything needs to be right on. Thanks gang.

Sorry, no magic, quick cure that would get your batteries up to standard by this weekend. Well, I take that back, it's called money, enough to go buy you a new pair.

While buying, spend a few more bucks (about 40 - 50) and get you a 1.3 amp BatteryMINDer Plus. It's claimed to desulphate batteries as well as being a maintainer. Skeptical about their claims of desulphating, I bought one a few months ago. I had a 1 1/2 year old battery that came out of may dads boat that had gotten where it wouldn't hold a charge, he's not the best at keeping his charged. Fully charged the specific gravity was 1.160. After six weeks on the BM+, it now has a specific gravity of 1.280. I have a battery I keep around for my transome mount TM usde in ponds, it had gotten where it would only hold about 12.2 volts, after a month on the BM+, it now holds 12.77 volts. About the only time I drive my pickup, is towing my bass boat. I left the lights on about 15 minutes one night using them to light the boat up while I was doing some work and they went dim. Two weeks ago, I check it and the two end cells were at 1.230 and the other at 1.260. After two weeks on the BM+ the two end cells are at 1.275 and the others are at 1.300 (with it still connected).

Needless to say, I'm no longer a skeptic about the thing actually desulpating a battery. Now, I did try it on a couple of two year Everstart Maxx's that I recently took out of one of my boats and it didn't help them. They were just used up. Didn't figure it would help them since they were always on my onboard charger in a float mode. For a $60 battery though, I figure you get what you pay for.