I just got some of these in my store and agree with the battery configuration. It's extermely tight. You have to insert the cells in the right orientation and order or they won't fit. On top of that, there is little room for the plug. It's possible to fit everything in, but very, very tight and finicky. We tried using a standard 9.6v NiMh nunchuck and they were too long. A
9.6v NiMh "AA" "TWINS" battery looks like it would fit but the two tabs in the front inside the handguard would have to be trimmed off. An
Intellect 7.4v/1000 mAh lipo fits perfectly.