Nortel Networks Nortel 4075 - Manual (Page 219)

Handset accessories
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4. If you need:
to install a memory (MEM) card, see “MEM card installation and
removal” (page 222);
to install a Bluetooth wireless technology module, see “Bluetooth
wireless technology module installation” (page 225);
to charge the battery pack refer, see “Charging the battery pack
(4075 only)” (page 220).
5. Install the battery pack, pushing it into the casing as shown in
Figure 23.
6. Press the battery pack down until it locks.
7. Install the battery cover and lock it.
Figure 22: Unlocking the battery cover