1S Battery Case Storage

Case for storing 1S batteries with capacities of 300mAh and 450/550mAh. Tested with Tattu HV 300mAh and Tattu HV 550mAh but should be compatible with all batteries sized 69 x 10.5 x 7mm for 300mAh and 71.5 x 15.5 x 7.5mm for 450/550mAh. Original author is xspeedasx_2101577 from printables, I've made 550Mah remix from 300Mah version.