My Ping 36 v has been charging for about 80 cycles or more on sla chargers. It's still balanced since it has not needed balancing. I discharge at a lower rate, under 1.5 c so my pack stays balanced. I recently tweaked one of my soneil chargers to a higher voltage, and I can't tell if it balances, since it would only do it if the pack needed it. When the pack was new, It would do the balancing cycle for awhile every charge, but after a week or so , it stopped doing that, and even when I still had the Ping charger, it never did any balancing after that. One of my chargers, a cheapie, does not have the adjustable voltage, but most of the soneils seem to.
In summary, if you treat the battery pack right, you may need balancing a lot less than others with high discharge rates.