ZMR 250 Battery Grip

thingiverse

I designed two distinct battery grips for the ZMR/QAV 250 chassis after encountering issues with my LiPo getting ejected during crashes when strapped directly to the top. To address this problem, I created a lightweight piece that would provide a better grip on the battery while also spacing it out and preventing screw heads from digging into it. This design is likely the lightest option available for securely mounting a LiPo on the ZMR/QAV 250 chassis. The first version, V1, was designed in SketchUp and works well when there's no camera on top. It fits batteries with capacities of 1300/1400 mAh or smaller perfectly. I used Fusion 360 to design the second version, V2. Although it's my first time using this software, I was impressed by its capabilities. I reused dimensions and design elements from the original design but made some tweaks to meet my current needs. This version holds the battery further back on the chassis, leaving space for a camera mount that I'm currently using. It also accommodates my 1800 mAh battery due to its extended length. However, this design is intentionally less balanced than V1 and might not prevent front battery ejection as effectively. Both designs are intended to be printed in TPU or another flexible material to ensure a good grip on the battery. Although printing them in hard materials may also yield satisfactory results, I recommend using flexibles for optimal performance. If you're interested in modifying these designs, I've included the files for your reference. If my design has helped you in any way, please let me know!