Fully adjustable aluminum and graphite battery pack owner enabling to utilize standard hard case batteries of numerous proportions from different manufacturers. To get rid of the play and battery pack motion, the height, width and size are fully adjustable. Slots inside graphite backstops enable to regulate the length and width. After installing the battery pack set up graphite backstops are pressed beside the battery pack and tightened with screws to aluminum mounts. Swivel battery strap will be assembled and tightened with aluminum nut. The adjustable holder as well as the battery backstops are CNC-machined from lightweight aluminum additionally the battery holders are machined from premium lightweight graphite material.