Nikon DTM-350 Instruction Manual page 16

Attaching the BC-65
Be sure to turn off the [PWR] key before attaching or detaching the
BC-65.
Avoid touching the battery pack BC-65 contacts.
Before attaching the battery pack, first make sure that the surface
where the battery pack attaches is clear of foreign matter, and then
press the battery pack into place until the battery mounting button rises
up to the battery pack top surface. If the battery pack is not attached
securely, it could adversely affect the watertight structure of the unit.
(1) Align the two projections at the bottom
of the battery pack with the concave
parts of the instrument main body.
(2) Attach the battery pack by pushing in
while holding the instrument.
(3) Make sure that the battery mounting
button is released.
Detaching the BC-65
(1) Depress the battery mounting button while holding the battery pack.
An external battery (optional accessory) is available for use with the
DTM-350/330. When the external battery is connected and the battery
pack BC-65 is mounted on the instrument, its electrical source will
automatically be switched to the one with the higher battery power.
Read also the instruction manual supplied with the external battery.
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