I just purchased the 3s 2200 mAh battery and Li-po charger combo yesterday, I have not had a chance to test it in my FW-190 yet. I was only getting 5-7 minutes of flight time with the Ni-Mh stock batteries so this should help. The battery/charger combo was $75 from Hobbytown USA in Omaha Ne. I decided to give it a try as the recommended thunder power batt. was $75 for just the battery and no charger. I'm out of town this week on business so won't be able to test it till this weekend. I'll post the results.