The new  BDC71 grey Li-Ion Battery for Topcon and Sokkia. This grey higher capacity battery replaces the older BDC46C black battery which has been discontinued.

For use with: 
Topcon RC-5 remote
Sokkia RC-PR5 remote

Note: this battery is NOT compatible with the old black CDC68 charger. It must be used with the CDC77 grey dual charger

7.2V
2,993 mAh
21.54 Wh
Charging time 4 hours