Yeah...well, almost.

The 10-12 hours is a guess. If your charge is like mine (which likes to "false peak") you can charge them to capacity with one charge at a slow, or balancing, or forming charge. Just pay attention to temps. YOu shouldn't have to worry too much about temps at such a slow rate as you individual cells will dissapate heat quicker than they will overhcarge...or something like that. Anyway, YES!

4.5 amps is high for 3300 mah packs.

4.5 amps is good for 4500 mah packs......