Originally Posted by
BaconRaygun
Umm... man, I'm sorry, but you are starting to confuse me. I'm not sure why you think I said you don't need to balance two s2 packs but would need to balance one 4s pack. I did not say that, nor did I imply it in any way. I just went over everything I posted and I've been really clear, so I really have no idea what you are talking about at this point.
Originally Posted by
mrreet2001
If you are running multiple packs to create a larger pack (twin 2s to 4s). Shouldn't they all be balanced together? I would think having 2 cells at a different balance voltage than the other 2 cells would defeat the whole purpose of balancing.
Originally Posted by
BaconRaygun
No, because you are still balancing them. The charger dictates the end voltage, not the way the pack is constructed. Assuming the balance lead is wired correctly and the charger is able to charge each cell independently, then the main contributor to how your packs balance is the charger. This is of course assuming the pack itself is healthy.
That's the whole point of balance-charging.
Balancing a pack makes all the cells the same voltage. How exactly can a charger balance all 4 cells if you balance them separately? If you balance charge 2 2s batteries separately and run them as a 4s you won't have 4 balanced cells you will have two pairs of balanced cells.
From iCharger manual:
On Balance mode, the charger will monitor the voltage of individual cells to control it within the Chg Cell Volt and equalize the voltage in all cells, to avoid some cell voltage over-charged or not full.
If one pack gets balanced to a lower voltage you run the risk of running 2 of the cells under voltage.
Originally Posted by
BaconRaygun
I was referring to packs that have already been balance charged. Why would there be a difference, and more importantly, why would balancing them together have an impact on their final resting voltage?