New 3D printed PETG pentax 645 battery holder. Designed with original zuiko diamond grip. Uses one 9V battery (preferred for lighter use), and copper contacts. Wired and ready for one 9V battery. 2 9V batteries can be run in parallel. Wiring soldered into place. Does not come with a 9V battery. It is advised to separately purchase a rechargeable 9v battery. Works with the original/stock battery grip.