Parallel vs Series
03-13-2011 | 07:37 PM
#16
Joined: Jul 2008
Posts: 11,530
From: Houston, TX
Im running 2s 5000mah lipos and the icharger 208B (8s, 350w, 20a)
But i think i get it now. as long as my charger can handle the watts and amps needed to charge the packs, and the packs are all at about the same voltage per cell, i can charge in parallel with no problems. i just need to use (5a per battery for 5000mah = 5 x 7.4 = 37watts ---> 20a x 7.4v for 4 batteries = 148 watts) all of the amps my charger can push out to be able to charge at 1C for 4 2s 5000mah packs in parallel.
But i think i get it now. as long as my charger can handle the watts and amps needed to charge the packs, and the packs are all at about the same voltage per cell, i can charge in parallel with no problems. i just need to use (5a per battery for 5000mah = 5 x 7.4 = 37watts ---> 20a x 7.4v for 4 batteries = 148 watts) all of the amps my charger can push out to be able to charge at 1C for 4 2s 5000mah packs in parallel.
You've got the right idea, but a 2S full voltage is 8.4v, not 7.4v - that's the 'nominal' voltage ('nominal' voltage is supposed to approx the voltage under load), so the watts are 42watt for a 2S 5000mah charging at 5amps, and for 4 in parallel, it'd be 168watts. Still, a 208b has plenty for what you're considering.
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