No, Series double voltage but not mAh. Parallell doubles mAh but not voltage.
@sl33py http://calc.esk8.it/#{"batt-type-lipo":1,"batt-cells":10,"motor-kv":213,"system-efficiency":85,"motor-pulley-teeth":16,"wheel-pulley-teeth":36,"wheel-size":83}| Here is written that there is 55k ERPM
i have orangatang 70mm 80a 4president orange wheels and was wondering if 12mm wheel pulley would fit