Dear friend: any specializes battery store can recell the hand grip batt,which is a 500ma 12 V one.You can also feed the camera with an external batt,such as those used by many video cameras,like a 12v 2Ah one,which is small and convinient.With that batt you can roll a lot of 100 ft.spools.Another tip: for individual frames exposures,time is not very accurate.There will be some flicker,due to small variations in exposure time frame to frame.Well,let me know
how it goes.Good luck! My private mail is : jdl16352002@yahoo.com.ar