depends.... what voltage is needed by the chip?? ( 3.7 or 7.4?) do you plan to buy a 4 bay charger?? or have 12 batteries on hand to swap out with? and why do you want so many batteries in the box? longevity or power? Parallel batteries give increased amps and longevity and seriesed give you increased voltage, but the same amps as a single battery. Also series sets do have a tendancy to be more unstable in mech mode but since you are using a chip, there should be some protective factor there. Does the chip go into mech mode when the ohms are too low?? if so... series sets may be an issue....