The specs for the heat pads suggest that the draw 600ma at 5v
El Caron, the total voltage with the lipos in series was 14.8v, according to ohms law if the resistance of each pad is 8.3ohms, I=v/r, I would work it out as I= 14.8 / 8.3, the current being 1.78amps. How did I draw 4Amps, excuse my lack of knowledge on this but I'm new to creating circuits. thanks.
Thanks for getting back to me, I see what you mean by putting the batteries in parallel. I think the max current output is 2200ma, so by putting them in parallel, they remain at 7.4v and the max current is doubled to 4400ma, is that correct?
No, parallel resistors combine according to 1/R = 1/R1 + 1/R2. For R1=R2, that means R=R1/2. So that is 4.15Ohm