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#11040552 - 08/13/15 07:13 PM Simple maybe Stupid Battery Question..
TerryWilliams Offline
Pro Angler

Registered: 03/21/05
Posts: 771
Loc: Wylie, TX
If I have 2 12 volt batteries, wired in parallel (+ to +, - to -, for a total of 12 volt output to the trolling motor, not 24v) - can I use a single bank charger to charge both batteries by hooking up the charger to one of the batteries?

Thanks!
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#11040928 - 08/13/15 09:44 PM Re: Simple maybe Stupid Battery Question.. [Re: TerryWilliams]
Gamblinman Offline
Extreme Angler

Registered: 11/26/02
Posts: 2321
Loc: Yantis, TX
No. Each battery should be charged independently.

Gman
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#11041229 - 08/14/15 07:16 AM Re: Simple maybe Stupid Battery Question.. [Re: TerryWilliams]
Jones Trolling Motor Offline
Angler

Registered: 05/01/11
Posts: 460
Loc: NE Texas/SW Arkansas
Yes, a single bank is used if you're in parallel as stated. You are effectively charging one "big" 12V battery. Some will say that charge times will double, but that's not necessarily so. Charge time will have a relationship to how deeply discharged the batteries are during a day's fishing. One drawback about this type system is IF a battery in the parallel connection goes bad, it becomes a "load" on the other battery and will drain it prematurely also.
Using a two bank charger without disconnecting one of the jumpers could result in the charger reading itself from the other battery and "thinking" it has charged, then cutting off.
John


Edited by Jones Trolling Motor (08/14/15 07:17 AM)
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www.jonestrollingmotor.com
texarkana, Ark/Tx

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#11043315 - 08/15/15 08:47 AM Re: Simple maybe Stupid Battery Question.. [Re: TerryWilliams]
Hancock Offline
TFF Guru

Registered: 10/06/12
Posts: 13185
Loc: Brazos or Paluxy
Yes you can. It's not much different than charging batteries in series (24v or 36v). Diesel pickups run in the same setup. A weak battery has the same effect on any multi-battery setup.

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