Will this charger work?

[Aidan67676767]

I have this 36v charger and I am trying to charge 3 12v batteries in series, it doesn't seem to be working, is it the right charger?
36V 2000mah Sealed Lead Acid Battery Charger with XLR Connector Us Plug and Green and Red Led Display https://www.amazon.com/dp/B014XH9QQO/ref=cm_sw_r_cp_apap_QKxKHnViQ4pyL

 

[Bluejets]

What are the 3 x 12v batteries?

 

[73's de Edd]

SERIES charging can be " VEWY-VEWY " problematic, you need 3 identical batteries and all of them being at the same state of discharge, or the "BIG DOG" gobbles it up and the weaker one(s) starve.

 

[WHONOES]

If your charger is only 36V, that will not be enough to charge 3 batts in series. You will need 42V. As 73's de Edd said one with lowest charge will dominate.

 

[Aidan67676767]

Ah, thank you, they are SLA Batteries, they are all the same, any other thoughts?

 

[WHONOES]

A I have said elsewhere, you need 2.35V per cell to charge lead acid batteries. If you re using sealed lead acid types, you should limit charge current to 25% of capacity. If you have 3 of varying capacities, set to the smallest one.

 

[Bluejets]

If your charger is only 36V, that will not be enough to charge 3 batts in series. You will need 42V. As 73's de Edd said one with lowest charge will dominate.

Link shows 42v 2a.... Thats why I asked what are the 3 x 12 batteries. "doesnt appear to be working" could cover many possibilities.

 

[Terry01]

Link shows 42v 2a.... Thats why I asked what are the 3 x 12 batteries. "doesnt appear to be working" could cover many possibilities.

That's what I was thinking Neeb. Can you elaborate a bit on "doesn't appear to be working"??

 

[WHONOES]

If you charger is not .............. charging, you could have a dead cell in one of your batteries, that would cause you problem. You could check is this is so by connecting a car headlight bulb across each battery in turn. The one that doesn't light up is the culprit. If you do have a dead cell, there is not much you can do other than replace the dead'un.

 

[AprilSteel]

Hey?? In my book charging a string of series batteries if the charger sends out 10 amps then 10 amps flows through every battery in the string does it not . In fact every cell in each battery along the way.
Internal resistance adds together to determine the current . If 10 amps is flowing then it is flowing through all the resistance because the voltage is enough.

Where does the big dog bit come in?
I know its an old thread but needs some explanation Edd.
Perhaps you mean parallel charging.