Initially I was using the recommended 2S 280mah batteries in my UMX T-Timber and would see a good 4- 7minutes of flight time depending on how I was flying but once I tried these 430's i never went back. My flight time would reach an astounding 15 minutes (give or take) If i was light on the throttle the entire time. As far as fitment goes, this battery is quite a bit larger than my 280's and just barely fits when laying flat in the battery compartment. It also weighs a little bit more than the 280mah battery so the plane is slightly nose-heavy, but this was easily mitigated by adding some more velcro so I could mount the battery further back. I can't speak for other aircraft, but if you have the UMX turbo timber or are planning to get one then I HIGHLY recommend getting this battery!