Pentax Optio WG-1 GPS Operating Manual page 40

Use the supplied battery charger (D-BC92) to charge the supplied
rechargeable lithium-ion battery (D-LI92) before using it in the camera
for the first time or after a long period of non-use, or when the
[Battery depleted] message appears.
Note: AC plug cord "Listed, Type SPT-2 or NISPT-2, 18/2 flexible cord
rated 125 V, 7A, minimum 6 ft (1.8 m)"
Charging indicator
While charging: Lights
arging finished: Turns off
2
To power outlet
Battery
Battery charger
-- AC plug cord
1 Connect the AC plug cord to the battery charger.
2 Plug the AC plug cord into the power outlet.
3 Place the battery in the battery charger so that the
PENTAX logo is facing up.
The charging indicator turns on while charging.
When charging is finished, the charging indicator turns off.
Remove the battery from the battery charger when
charging is finished.