Originally Posted by jeff4912
I bought a paraboard from Buddyrc, nice product.
Hooked it up to my Turnigy Accucel 6 charger which says it has 6amp output.
Plugged 3 4S 3000Mah batteries into the Paraboard and programmed for max. 6amp charge.
Accucel 6 will only give me 3.4amps with plenty of power from the supply.
Why am I only getting 3.4Amps?
Your Turnigy Accucel 6 charger has a maximum rating of 50 Watts. Since watts equals Volts times Amps, that will limit your maximum current output when using more series cells in your LiPo battery. (More cells equals more voltage = higher watts to charge your battery pack, assuming the same selected charge rate in amperes.)
So, you've got 4.2 Volts times 4 cells, that is 16.8 Volts DC. Maximum Amps output would be Amps = Watts/Volts, or Amps = 50/16.8, so maximum Amps will be 2.97 into a four cell LiPo battery.
The only way to increase your ampere capability would be to buy a higher powered LiPo charger, with perhaps 100 or 200 Watt output.
Something like this unit would do the job:
FYI, I've got two $$$$ Cellpro Powerlab 8 chargers with a 1344 Watt capability. Each is capable of charging my A123 battery packs at 30 Amps, into the A123 battery pack. The battery pack is configured as a 6S4P for charging purposes.