Originally Posted by
HBRob
Yes, but you will want to charge and balance them seperately, also would be best if they are of similar mah capacity. Using batteries of different capacity could result in over discharging the lower capacity pack.
I would state that much more strongly: It is almost necessary that they be the same capacity unless you have the discipline to strictly limit your runtime to assure that the lower capacity battery is not over-discharged.
An alternative is to get a low battery alarm and put it on the lower capacity battery.