My DX7 mother board fried itself last night. I was charging the battery. the stock 1500 8 cell NiMh with my onyx 230 charger. about 8 min into the charge there was smoke. I unplugged it, checked the battery, battery looked fine. then noticed burn marks on the back case near the green bind light. will be calling spektrum today. I have no idea what happened, Left a nasty burn mark on my shop floor that will have to be repaired. Good thing I didn't decide to go outside and mow the grass or something. I have charged this battery in the DX7 at least 30 times with no issues.