SONY DAT TCD D10 & D10 PRO II battery (NP-22 NP-22H)adapter
It battery adapter can let you use Li-ion battery(18650) to replace old Ni-Cd battery
You also need order material as below:
Copper foil
Conductive gasket
You can use 2 of 18650 battery (3.7~4.2v in series)