LiPo batteries

[Gators9606]

What does 22.2V(6S2P)4400mAh18C actually mean?

Also I have a MRC 989 Super Brain charger, what would be the proper settings to get the best performance out of this battery?

[uneverno]

Hi there,
it means that you have a battery composed of 12 cells: 6S2P = two 6 cell Series wired packs connected in Parallel. LiPo's put out 3.7 volts per cell, so 3.7 x 6 = 22.2 volts. The two 6 cell packs wired in parallel increase the amperage of the pack, but not the voltage. The more amperage capacity you have, the longer the pack will last before having to be recharged. The more voltage, the faster your motor will spin.

4400MAH is the dicharge capacity of the battery in milli-amp hours. What you actually have are two 2200 MAH packs wired in parallel. In order to calculate the discharge rate, one would need to know what the power requirements of the electrics, i.e. motor, servos, receiver, gyro etc. on the heli are.

18c means that the battery can be continuously discharged at 18 times capacity, so: 4400MAH = 4.4 amp hours x 18 = 79.2 amps continuous discharge rate.

I am not familiar with your charger, so not sure about setting. With my charger, I tell it the number of cells and what type I'm plugging in and the charger does the rest. If your pack has a balancing connector (and I can't imagine a pack that size doesn't) I would highly recommend getting a balancer for the charger. That will ensure that each cell in the battery is maintained at as close as possible to the same voltage as the other cells in the pack. This will increase the lifespan of your battery pack, and will also help prevent possible disasters related to over-discharging an individual cell.

MRC is good stuff, but I don't know if the charger has a built in balancer. If it does, ignore the last bit I said about getting one, and use the balance leads to charge your battery.