With the C-9000 you can change the charge rate. I think the default is 1000mah, so batteries will charge in about 3 hours, give or take. The manual recommends against a very slow charge, apparently it makes it harder to work out when the cells are fully charged.
During a refresh cycle (charge, discharge, charge) it also tells you the capacity of your cells. Some of my older cells were at about 800mah, a breakin cycle bought them up to 1800mah again - not their full capacity of 2500mah but they're older and not the best brand, and had been in dumb chargers.
My 2700mah Powerex cells report as very close to rated capacity. The CTA Digital cells I bought from B&H (ABSOLUTE CRAP) held almost nothing, and in practice can barely power a flash. B&G refuse to accept them back or replace them, and the manufacturer didn't respond to a support request.



