US Battery "finishing" charge recommendation

NinerBikes wrote:

sh410 wrote:
Thanks Mex, I should have been more clear. I look to equalize GC 6v batteries individually rather than in series.

I do have a dumb 6v charger but its only 2Amps. I not sure its enough.

Don't got no 31's :)

Pair two 6vs up to 12V in serial, and charge up with a 10 amp 12v charger?

My observation has been that if you need 5% at 16.0V, most chargers will drop off to that level, and you need about 10% of your battery amp hour ratings to keep at 5% at 16.0V. In other words, for a pair of GC-2 6v batteries rated at 225 Amp hours, if hooked to a 12v charger, you will need 22.5 to 25 amps to hold 11.25 to 12.5 amps at 16.0V on a basic old fashioned 12v charger.

So if you are charging GC-2 batteries and need to desulphate, get a 12v 25 amp charger, minimum, to desulphate properly.

I use my VEC1093DBD to "equalize" my pairs of 6s. It only goes to 4.1 amps in Equalize mode. However, it is not necessarily doing any desulfating other than normal recharging.

I have tried the variable voltage PowerMax instead on a pair of 6s and it also only did about 4 amps then tapered when set to 15.5v

I am not clear how you can get a "full" pair of 6s to accept higher amps than that unless you have an 18 volt charger or what ever. IMO if they were sulfated (so with reduced capacity) they would accept fewer amps than 4.1 at those voltages