I use a Checkpoint balancer with a Lipo version CE GFX and it charges the same way as your Ice. The amperage slowly dropping as it is charging. I charge my packs at 6 amp and have not had an issue yet. It does not seem to take any longer then when I used to charge Nimh packs. I have three packs though, so I don't need to wait for the pack to charge to run.
JRXS Type R, I have four of them!! ;) ( Yes, I still have them!!)