I would never charge my batterypack with a lead acid charger.
Thanks for the inputs folks! I discovered my Imax B6 works with the 11-18V DC input.
After charging my batterypack without
balancing, all 3 cells was at excatly same voltage! Thats nice.
But how can that be when they where unbalanced before charging?
Read - Bulk Charging Review
I wrote it specifically to explain this, and your other related questions.
The best thing about bulk packs is that you do not have to capacity match-test every cell!
Only every bank!
Once again ... !
Begin with pack fully charged and equal voltage at each bank.
Discharge deeply, but not below 3.7V for any bank.
Mark weak and strong banks.
Recharge to full ... banks should be equal again - equal energy out >>> equal energy in = same voltage as at start. (at moderate rates)
Remove cell(s) from strong bank(s) and add to weak bank(s).
Banks should be more equal ... repeat as necessary.
When properly balanced:
Voltage between banks will be identical at full charge and at maximum target discharge!
Balance charger will not be required!
Bulk charger can speedily and reasonably safely charge your battery pack.
If you failed to remove self-discharging cells ...
You will need to balance charge every single time ... immediately before any use!
Of course you should monitor your pack for broken connections, cell gone bad etc.
Just compare bank voltages, if any imbalance occurs ... hunt down the problem.
12.44V power supply will work nicely ... if!
If ... It survives a more than 15A discharge without cooking a or blowing some component.
Using a light gauge charging wire might help keep amps below 15A!
12.44V is much preferable to 12.60V for prolonging cell life.
Of course I recommended not exceeding 12.3V ... based on the cells you are using.
(Did you not notice that your iMax B6 charges Lion (Li-ion) to only 4.10V?)