Nokia 2135 User Manual page 12

2. To insert the battery,
position the battery so
the gold-colored contacts
match up with those on the
phone, and insert the battery
into the battery slot.
3. Push down on the other end
of the battery to snap the
battery into place.
4. Align the back cover with
the back of the phone, and
slide it toward the top of the
phone until you hear a click
to lock it into place.
5. To remove the battery,
remove cover (see step 1)
and insert your finger into
the finger grip, to lift the
battery from its compartment.
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