Minn Kota MKC-10 won't shut off

[BassMan283]

For about the past year, my MKC-10 won't display the "charge complete" light when charging my trolling motor battery, just keeps charging until I turn it off manually. Yesterday, I bought a new battery, took it on the lake for a few hours, then put the charger on it. Went out this morning, "charge complete" light was not on so I shut if off. Couple of hours later the battery tested 12.98-13.02 volts.<br /><br />When I hook this charger up to my starting battery, it runs for 50 or 60 seconds and the "charge complete" light comes on. That battery checks around 12.6 volts.<br /><br />For the first year I had the charger, it behaved as advertised. I had theorized that wear and tear on the old battery in some way prevented the charger from detecting a full charge, but since it behaved the same way with a new battery, I'm stumped.<br /><br />Anybody else got any theories?

 

[BassMan283]

Re: Minn Kota MKC-10 won't shut off

Me again.<br /><br />I sent a message on the Minn Kota web site and got the following response:<br /><br />I would recommend taking a reading with your volt meter of the battery<br />charger hooked up to a battery and charging. The shutdown level is 14.8<br />volts. If the charger on a battery does not reach that charging rate,<br />it will not shut down. That can indicate a battery that is not reaching<br />a full state of charge. <br /><br />I haven't had time to try this yet, but 14.8 sounds high to me. I have in the past checked voltage while the charger was on and it seems to me that 13.8 was about the highest I saw. Same when I check the X-65 on the starter battery while the motor is running.<br /><br />Any ideas?