I love NewBeeDrone, the Cockroach 65mm frames and the warranty. However, I decided to try the 75mm frame and have to say they are extremely fragile. I typically reinforce all my frames in the corners with e6000 and have added protection, but that did nothing to help here. I suspect this frame is just basic plastic and would love to see it in a more durable polycarbonate or even better a Polypropylene version.
The best batteries when you want the most quick and maneuverable 2s drone are New Bee's Nitro Nectars 300 maH. However when I want or need longer flight time, then these are my choice. Tattu and NewBee's batteries are the only batteries I use anymore!