Looking to buy a new set of 5000mah lipos. I need 2 2s lipos for a total of 4s. I don't understand the difference between a battery that is 2s2p and a battery that is 2s1p. I have a set now and I don't really know what they are....they seem to work just fine. 2, 2s lipos, 5000mah, 7.4v each, paired together for a total of 14.8v. I thought that would be a good sweetspot for my esc/motor combo. I bought my original lipos based on them being 2s and 7.4v....I was not aware of the 1P/2P thing. Now, I'm looking for a set for my son and don't know what to buy. Any help from the battery experts out there would be appreciated