AT&T 2820 - Manual (Page 9)

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HANDSET BATTERY PACK
The handset uses 1 NiMH 650 mAh 3.6V (AAA) rechargeable battery
pack. The removable battery pack is already pre-installed in the handset
for you.
NOTE: Before using the handset, and to prolong battery life, place the
handset in the base handset cradle and charge for at least 15 hours.
WARNING: You must replace handset in charger base for periodic
charging. Failure to keep the battery fully charged could result in
decreased battery life. If the handset is removed from the base unit for
long periods of time, remove the battery.
To activate and charge the handset battery pack:
1. Pull the battery contact tab out slowly and
remove as shown.
2. Place the handset in the cradle of the base
unit.
3.
The battery icon on
the display will flash and the base indicator
light will turn on to indicate the handset is
charging.
4. Charge battery pack for at least 15 hours
prior to first use.
5. When the battery is fully charged, the battery icon will stop flashing
and
will appear.
ACTIVATING AND CHARGING THE HANDSET BATTERY PACK
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