Psion Teklogix Hand-Held Computer 7530 G2 - Manual (Page 280)

Appendix B: Port Pinouts
Battery Contacts
B-2 Psion Teklogix 7530 G2 Hand-Held Computer User Manual
8. Docking Station Id. Identifies device attached to the docking station
connector. The external device applies a specific resistance between
this pin and ground as identification.
9. Ground.
10. USB Device Minus. Connects to other USB host such as a PC.
11. USB Device Plus. Connects to other USB host such as a PC.
12. Ground
B.3 Battery Contacts
These contacts represent right to left numbering with the docking port pointing
toward you, and the battery contacts facing upward.
Battery Contacts
Pin # Signal Description
1 POS Positive Battery
2 CLK SMBUS Clock
3 BAT_D Presence/Cell Count
4 DATA SMBUS Data
5 NEG Negative Battery