RE: Home made Lithium Ion battery charger
i dont know what the chips are for, i havent gotten my packs yet, and im not getting single cells, im getting a kokam pack.
as to charging, you can charge them series-parallel, but it isnt always recommended.
also, the cells have to be the same ratings, ie all 700mah, or all 350mah, you cant mix and match cells, 350mah+700mah to make a 1050mah pack.
THAT COULD BE DANGEROUS!
i dont know exactly what would happen, but i wouldnt want to find out.
if you had 4 350mah cells, you could make 2x2s packs and put them in parallel with an adapter board to fly, that would give you a 7.2v 1400mah arrangment
li-poly and li-ion are the same basic chemistry so you can use the same charger, just dont exceed the charge rate of the pack, ie 1c=1xcapacity= no more than 750mah charge for a 750mah pack.
can always charge at less than capacity, but not voltage, it just takes longer.