I have both and prefer the 610i. I dont plan on going over 6s to that really doesn't matter to me. I really just prefer the balancer built in and now I can charge my packs at a higher rate if I want.
I think Lipos don't have "memory" in there cells. How would it shorten the life? I might be wrong though.
I dunno?.. but I've read somewhere that discharging it at for example... @ 50 Amps life cycle would be shorter than @ 30 Amp discharge.... so I just assume that charging it faster would shorten the life cycle... but then again, I'm not really sure..
OK i just contact FlightPower and they tell me that i can charge my EVO25 at 2C rate without trouble, but this shorten the life of the pack. They tell me to did it only when i must did it. For exemple, in race condition, when i've to re-peak my pack just before the race.
But i'am scare to do this with my brand new $300.00 flightpower pack
I would not take any chances of doing anything that is not suggested by the manufacturer of the battery. The first thing that I would be worried about is damaging the cells and ruining the pack. The second thing is violating the warrenty of rhte product and casuing one to have to bear the expense of replacing the packs due to that action.
Hence I would stick to the rates prescribed by the people who made your batteires for your own good. If your particular manufacturer says go ahead then what do you have to loose. Of course you paid for the product it is your right to do whatever you wish with them. have a great day.