Pentax R-322N - Manual (Page 12)

P9
1 BEFORE USING THE INSTRUMENT
1-4 Attaching and Charging the Battery
Removing the Battery
Turn the lock lever anticlockwise and remove the Battery.
Lift up the battery pack and remove it from the instrument.
Be absolutely sure to turn the power off when removing the battery as
removing the battery while the power is still on may result in damage to the
instrument.
Attaching the Battery
Align the guide pins on the battery pack with the guide grooves on the
instrument and push the battery pack down into place.
The battery is attached when you hear the top of the battery pack click into
place.
Turn the lock lever clockwise to fix.