The original battery is 100 dollars apiece. Do NOT use the 9v conversion. Besides, the basttery weight is part of the vib. damping you have working for you. Instead, I fabricated battery packs out of box tape, chipboard (like from a scratch pad), and five 1.2v AAA rechargeables soldered in series. Then wrap the set with cardboard to fill out the space of the compartment. Tape chipboard ends to this rolled-up tube, and affix some copper tape or some such, and solder the wires coming off the battery set. Works perfect. Right voltage, good battery life, and a little bit of needed weight to add to that natural tripod, called the motor drive unit.