RE: Help charging LiPos.
The lipos should have a charge rate somewhere on them like charge at 2C or similar
If not to play it safe charge at 1C which would be the capacity of the pack. Like the 4500mah lipo would be 4.5Amps, and the 5800mah lipo would be 5.8amps (this one might need lower or even half unless you have a VERY nice charger as most like the 60watt chargers can't cope with 5S at that current)