Hi,
My new Turnigy batteries have arrived! They are 5000mah, 20C-30C, 4S. I am going to put two of them in parallel in my Blackjack (with upgrade 80amp ESC prop etc). When I go to charge them my charger only goes up to 4A. Does this mean that I wont get the full power out of the battery or that it will just take a long time to charge?

I am also trying to figure out what the numbers on batteries mean.

I know that S means cell and each cell give 3.7V

What does 20-30C discharge mean?

I know that 5000 mah means milliamps but what does this actually mean? Longer runtime? More power?

Thanks
Greg</p>