Charging two batteries at once???

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xltom

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I am looking to buy an extra battery for my trolling motor today and I was wondering if anyone here has charged 2 at once. Can I just use jumper cables to wire them in series????? Thanks.....
 
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FishFinger

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Good question.

I would imagine you could charge them in series just as you can draw off them in that configuration.

Jumper cables... You could but you'd have to ensure a good connection. I'd make up terminal connectors to be confident of the recharge.
 
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joesnuffy

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The batteries would be fine but I don't know how your charger would handle it.......
 
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Hawk

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I've had two Schauer battery chargers fer about 6 lustrums, so i just use them both on a 30 amp line to charge 2 batteries at a time. I have quite a few batteries around heer.

:D
 
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xltom

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Hawk,

Why charge both together if you have two chargers?

If you've got a bunch of batteries, how about kicking one down to the needy! I'm about to go look at one on CL for 20$ but.....I still want a gas motor....Should put that money towards one.....are you near spingfield/eugene?
 
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Hawk

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Hawk,

Why charge both together if you have two chargers?

If you've got a bunch of batteries, how about kicking one down to the needy! I'm about to go look at one on CL for 20$ but.....I still want a gas motor....Should put that money towards one.....are you near spingfield/eugene?


I have a clan of relatives that think all belongs to them, bro

:lol::lol::lol:
 
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xltom

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Just thought I'd ask. So why charge 2 at once...

by the way thanks for replying....and the link.
 
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Hawk

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Just thought I'd ask. So why charge 2 at once...

by the way thanks for replying....and the link.


Your welcome...


i've had these 2 chargers fer a loong time, so i have a 30amp circuit for my rv, boat, Gator 6x4 atv, 4x4, etc.....so i charge two of the batteries separately with them...

:D
 
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xltom

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wow, I thought I had a lot of toys. A 6x4 huh? is that amphibious?
 
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OnTheFly

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I am looking to buy an extra battery for my trolling motor today and I was wondering if anyone here has charged 2 at once. Can I just use jumper cables to wire them in series????? Thanks.....

Hey xltom, you'll want to connect them up in parallel not series. Any time batteries are in series the voltage increases. For instance, if two 12v. batteries were hooked up in series (+ to -) the the output voltage would be 24v. Hook them up parallel (+ to +) and (- to -) then connect to your charger or your system. :)
 
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FishFinger

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Hey xltom, you'll want to connect them up in parallel not series. Any time batteries are in series the voltage increases. For instance, if two 12v. batteries were hooked up in series (+ to -) the the output voltage would be 24v. Hook them up parallel (+ to +) and (- to -) then connect to your charger or your system. :)

That's right... I had it backwards wire in parallel :redface:
 
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xltom

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Good lookin' out. I should have thought of that. I just read an article describing how to test each cell, the sum of which equaling 12.something volts. I think for now(I got another battery today) I'll charge them one at a time until it becomes a problem...30$ wal-mart charger.....

Is it better to leave them on the charger when they are full? The charger claims to be "micro-processor controlled" . Should include a maintenance voltage right?
 
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Hawk

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Good lookin' out. I should have thought of that. I just read an article describing how to test each cell, the sum of which equaling 12.something volts. I think for now(I got another battery today) I'll charge them one at a time until it becomes a problem...30$ wal-mart charger.....

Is it better to leave them on the charger when they are full? The charger claims to be "micro-processor controlled" . Should include a maintenance voltage right?


12.75 volts is a fully charged good 12volt battery. You can use a Hydrometer to check individual cells.

Cells full of electrolyte may overflow during charging.

You can mark an ol' turkey baster or eye dropper (Battery) & use it to remove some acid/distilled water. The plates in batt should be covered.

When you have to add, only use the Distilled Water.


Have a Good'Un Bro.

:D
 
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OnTheFly

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I would say if your charger automatically changes to a trickle charge mode then just leave it plugged in all the time.:cool:
 
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FishTy

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I've got a battery selector switcch for my 2 batteries, and my onboard charger's positive termial is connected to the out going side of the battery selector switch. this way i can use the switch to decide witch battery I want to charge..OR if neither battery is very far down I put it on BOTH and it has always worked just fine..At first I kind of worried about 2 batteries on the charger at once but a few times forgetting about the switch and every thing working out OK.. and now I all most always charge them both at once and no problems YET and its been 4 years! So it must be OK!
 
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ecarpet1

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I used to think he who dies with the most toys wins but now I think he who dies the furthest in debt wins.

Toys are good.
 

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