Dual Bank Charger Output Voltage?

[rainylakefisher]

Anyone know what the voltage should read on a two bank charger? I went to test my trolling motor tonight and one battery was reading around 10V even though it was hooked up to a two bank charger all winter. The charger showed no error signals on the LED readouts, but I decided to test the output with it plugged in. Both leads showed 13.3V +/- which seemed appropriate. I'm pretty sure one of my batteries is fried and I was expecting to swap them out this year. Just want to make sure the charger is operational before loading up new batteries. Any thoughts?

[Kyhl]

13v sounds reasonable if the charger thinks the battery is charged. Do you have another charger to try?

If you put another charger on the battery and it says it's fully charged at 10v then one cell is dead inside the battery. Time to replace them (it).

[walleyemaniac]

Sounds like a bad battery to me as well. You can check your battery cells (lead core) by checking between each cell with a volt meter. It should read about 1.5 volts between each. On the end cells of the battery go from the battery post to the first cell.

The big thing with the charger is to make sure the amps drop down when the battery is charged (that the charger is going into maintainance mode)so you don't cook a battery. You need to unhook your batteries, check amps at your charger leads, leave the charger running, after like 15 minutes check the leads again and make sure amps have dropped off. I don't know what type of charger u have, so I'm not for sure the specs. I have a Promariner and that's basically the process of checking mine. I can look up the specs on mine if you'd like. Don't know them off the top of my head.

Not saying your charger is bad you might just have a bum battery. I'd do those checks though then you'll know if the charger caused the problem or not.