Charging batteries in sequence

[Swampa]

Kids left a switch on in my ranger and killed the batteries. 2 batts in sequence. I ran the charger all night on the original battery but no Bueno. Any advise? Pic of batteries below



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[oktx]

Did it show it was charging? Try to charge one at a time?

[b.latiolais]

Did you charge at 12v mode or 6v?


If you charge them in series you must have your charge set to 12v mode.

[super_dave]

A lot of times the charger needs to see some kind of voltage to even start to charge.
What you will probably need to do is isolate the batteries and use an old school dummy charger to bring them back one at a time. Once they have several volts, then you can put them back in parallel and charge them.

[Swampa]

Did you charge at 12v mode or 6v?





If you charge them in series you must have your charge set to 12v mode.

No I had it on 6v. It barely showed voltage yesterday and nothing this morning


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[b.latiolais]

No I had it on 6v. It barely showed voltage yesterday and nothing this morning


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I'd try charging them one at a time on 6v or change your setting to 12v and try to charge them again in series.

[AgBass01]

I'd try charging them one at a time on 6v or change your setting to 12v and try to charge them again in series.

Ditto

[TexasBob]

A significantly drained battery won't charge with a smart charger. Go old school charger that will charge steady no matter what or hook dead battery to a good one and charge both for a while but that's dangerous for your good battery if it's weak.


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[macVsog]

As other have said - charging in series 12v. Hope you get back to normal. Let us know how it went.

[Swampa]

Charging batteries in sequence

Thanks


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[dhillis]

No I had it on 6v. It barely showed voltage yesterday and nothing this morning


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Having the batteries in series creates a 12V circuit. You have the battery charger hooked up correctly but trying to charge a 12V circuit at 6V volts won't do any good. You can charge one at a time at 6V.

This is assuming those are 6V batteries??

[SaltwaterSlick]

Not sure what you mean by "sequence". Those batteries, well at least the one with visible caps appear to be 12 volt batteries. They are wired in parallel NOT series which means you have a 12 volt system assuming the batteries are 12 volt. I'm not up to speed on all the new stuff, but generally lead-acid batteries will have 2 volts per cell. That battery on the left has 6 caps (cells) therefore 12 volts. You should confirm that and if it is 12 volts just put your charger on manual or use an older charger that is not a "smart" charger to charge them.

[Texas276]

Check your charger manual. Mine has a manual mode you access by pushing the buttons a certain way after you plug it in. You have to watch the charge progression or it will over charge. Those batteries my be toast though and won't hold a charge since being drained so low.

Draining them below 30% is no good.

[dphillips62]

What everyone else said and also make sure you don't have a dry cell

[boweye]

The batteries are connected in parallel NOT series. The design is to increase the current flow required to start the ranger. They look to be 12V batteries. I don't understand why you want to charge them at 6 volts.