RE: B400 battery flight times
For sure. I recently went all through my Blade 400 and serviced all the bearings, lubed the tail rotor shaft and all pivots, etc. The stock battery lasted another minute, and the heli was quieter/flew better. I bought a couple of those Zippy lipo 1800's and they last about 8 min with mild aerobatics. However, when my E-flite battery won't fly anymore, the voltage is still at 10.7 volts or so, and the Zippy lipo gets down to 10.0 volts.