They got these right
It's a simple job,keeping a battery in a miniquad pulling 10gs, bouncing off the ground and hitting trees, but not an easy one. I've got whole box of battery straps, all of which I've tried and gave up on, even some handmade ones. None of them all got the details right, some were close (and a lot more expensive than the RR straps), but let the battery shift, slide back and forth, didn't fit right or wouldn't hold tension. (I did have to add stops, even with these) Now I buy these to go in my quads. (the other ones now hold cables neat in my shop) They got all the details right, and they just plain work great.