BDC-70 Li-Ion 7.2V 5240mah longer lasting rechargeable battery. This is a higher amperage than the BDC58 batteries and last longer. They are compatible with the CDC68 Charger and can replace the BDC58 in any of the previous series instruments or GPS.
 
Compatible with the following instruments.

Topcon GPS
HiPer II
HiPer V

Sokkia GPS
GRX1
GRX2

Topcon Instruments
ES Series
OS Series
DS Series
PS Series

Sokkia Instruments
CX Series
FX Series
SETX Series
SRX Series
SX Series