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>