The velcro on my batteries would not consistently hold the battery in place during flight. This part mounts in the hole that is in the battery compartment near the from of the model. The TPU is flexible enough to allow for installation and removal of the battery while this battery support remains installed in the model. Enjoy!

Trying to find a good way to store my UMX planes. I was a little concerns about damage to the foam on the tail, but it doesn't seem to leave a dent. Enjoy.