Oh shucks,my old flying buddy came by today,has not flown in 20 years. Took him to field,flew 202 and mojo25,he was impressed by the el flight. Last flight of mojo,i had beat kind hard on it,the batt came off,this with velcro backing and a strap. Plane not bad hurt,batt got dented,dont trust it so its trash. Guess got to rethink batt hold down,it slid up through strap with velco on back of batt,must be some big g force going on. So,what to do,use two straps 180 to each other.