I am using Turngery 2200 35c Batteries on my Blade450, they work well, but a tighter fit than using the standard batteries.<div></div><div>My warning is this? Reinforce the inside holes. I did this after I notice little cracks one one of the hold appearing. Removing and placing the canopy is hard on it, and still weaken and crack the plastic around the holes on the standard Blade Canopies.</div>

I noticed the same happening on my Blade 450 canopy and will do the same. I made a thin aluminium bracket which is turned up on the ends to support the battery better and prevent it from touching the motor.
Thanks.

I don't have that trouble with my batteries, I have put valcro on the bottom of the battery and where the battery goes on the frame, so the battery sticks togther with Valcro, so cannot move inside the canopy.