My buddy bought 2 50 ah lithium batteries and has a MinnKota 2 battery charger. MinnKota says it'll work with lithiums but it's not. He received the batteries @ 12.3 v and they haven't charged any more. He bought a 5 amp lithium charger to see if that would wake them but it hasn't. Please help.
what model charger is the minn kota? has he put a meter on the battery while its connected to the charger?
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Digital mk 210 and about 13.5.
do not recommend the use a Minn Kota digital on any lithium battery , but the 12.3 volts has nothing to do with that charger, any charger should bring it up above 12.3v
I would suggest putting the battery under a load for a while and then try charging again
Drewcraft Specializes in Lithium Batteries and Chargers, We carry all Brands of Trolling Motors and Graphs, Minnkota, Lowrance, Garmin, Motorguide
910-722-0001 call or text
info@drewcraft.com
A resting voltage of 12.3 on a new lithium battery seems abnormal.
12.3 v on a Lithium is dead! Or close to it at about 10% charge...
In order to charge you must have a difference of potential. You only have 1 volt difference. Spread out over dozens of cells it ain't enough IMHO. Perhaps your charger is sensing an overload, a Lithium cell will take all the amps it can get. My Lithium charger hits 14.5+ volts the minute I turn it on.
I think you have a charger issue, maybe the original charger shut the batteries down.
Is the charger communicating anything? Flashing light? Are there fuses missing between the charger and battery?
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Thanks for your help gentlemen, he's going to further work on the problem after turkey day.
What would help is, for each battery:
Battery voltage sitting disconnected?
Battery voltage with a load on it such as a light bulb?
Did the light bulb light up?
Battery voltage with charger connected but not powered up?
Battery voltage when charger first turned on?
Battery voltage after charger on for 5 minutes?
He ran one down to 12.3v and it charged to 13.4. We guess that one's good and haven't checked the other. Thanks everyone for the help.
I should be pulling out a min kota precision 460 today. It will charge lithiums. It has one bad bank, but has 3 good ones. I'll sell it to him cheap if he wants it. I'm in Canton.
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Thanks Twin, He bought another charger.
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