No more worrying about the battery slipping out of the battery strap. Thread the battery strap through the holes on each side and when you strap the battery in it will never go anywhere. You will need a 2cm wide battery strap to secure it to your craft. It will fit any 15cmx4.5cm batteries. The height of the battery in the picture is 4cm. I added the source file from 123D Design so you can play around with it.Printed on Prusa i3 with 0.4mm nozzle and 0.2mm layer height.