Charging at higher current rates does not really do you much good, mostly because the time taken to get to 4.2V per cell will be reduced and then the current starts to taper down.. so doubling the charge current does not half the charge time. This is very noticable at lower temperatures when the internal resistance is higher.
Charging at 1C is perfectly reasonable and with two packs you wont have any problems charging between heats when you have an hour per round.
The term "peaking" should not be used when taking about Lithium Polymer. In a NiCd or NiMH cell the voltage does reach a 'peak' at top of charge and then drops slightly in over-charge. With Lithium Polymer the 4.2V point is normally reached at about 80% state of charge and the remaining 20% is put in during the constant voltage portion of the charge (This 80% figure will vary depending on age, temperature etc but is a good guide for C/2 charging)
Anyone who charges at voltages above 4.2V per cell should be asked to leave a meeting as it is dangerous, pointless and a more than a little stupid. Safety testing for UN transporation etc do include over charging tests but you dont drive your car into a wall to see if the airbags work do you?
Each of you had a laptop or mobile phone. The lithium ion or Lithium Ion cell in that device has a protection circuit which will either stop charging (or shunt charge current away) if one or more cells reaches 4.275V. Not becuase the cell will suddenly explode at this voltage but becuase it's cycle life will be seriosuly reduced if charged at a voltage >4.20V.
If you use a balancer during charge then this reduces the risk, especially if you have a NiMH/LiIon charger where you might set it on the wrong program.
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