Currently i'm running 2x 6500 mAh Hyperion 2s batteries. They are about 154x42x28 each so it seems two of them would not fit. I was hoping to run a
5s pack(145x50x49mm) or
4s single pack(145x50x38mm) but it seems they are too wide (without spacers). Although in your first post you said that your existing batteries were 148 x 49 x 33mm ..or was that the dimensions of 2 single packs together?
..Looking further ..going down capacity there are
4s batteries that would fit or
5s. Lower capacity then i would prefer though and the last 5s would be a bit low on max amps.
Update: Checked out your picasa pics. You have two very skinny batteries in one pic and one large battery in another. What batteries are they? What run time do you get?