Had problems with my TM last year and had the batteries checked at Batteries Plus. They were fine, problem ended up being the circuit breaker. After that the trolling motor, a 2017 Minn Kota Ulterra worked fine rest of the season with the same batteries. They are Interstate deep cycles from 2014.
Now this year I'm having problems with the Autopilot and Spotlock not working but the TM will still work for hours without those features. Whenever I tried the features I got a set of chirps/beeps and that feature wouldn't work.
I charged the batteries with my other charger rather than the onboard Minn Kota charger and got the features to work again although only for about 10-15 minutes. I assumed it was the batteries. The TM continued working again without those features for hours.
One the batteries on the onboard charger batteries always goes to solid green (full charge) and one always flashes green. I checked the water in the batteries and one is definitely low. I can see the top of the plates by about a 1/2" inch. The water in the other battery is fine. Note: I do keep my batteries plugged into the onboard charger all year long and it is in a warm pole-barn all year long.
Can I put more distilled water in this battery and it will work or is it ruined now?
