Battery installation & charging – AT&T E3813B User Manual
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Getting started
Battery installation & charging
After battery installation, the battery may have enough charge to allow
you to make a short call. For best performance, place the handset in the
charger or telephone base and allow it to charge for 16 hours before use.
You can keep the battery charged by returning the handset to the
charger or the telephone base after each use. When the battery is fully
depleted, a recharge takes about 12 hours. The average talk time on a
fully charged battery is about eight hours depending on environmental
conditions, and the standby time when idle is approximately five days.
6. The bat-
tery may have
enough charge
to allow you
to make a short
call. For best
performance,
place handset in
the telephone
base or charger
to charge for at
lease 16 hours
before first use.
Low battery indicator
Return handset to the
telephone base or char-
ger to recharge when
this symbol flashes.
(Handset will beep
when battery is low.)
3. Plug the battery
securely into the
plug inside the
handset battery
compartment, match-
ing the color-corded
label.
To replace the battery, press
in and downward on the tab
to open the battery compart-
ment cover. Then lift out
the old battery and discon-
nect. Follow the instructions
on this page to install and
charge the new battery.
5. Slide battery
compartment
cover towards
the center
until it clicks
closed.
4. Place the
battery and
wires neatly
inside the
compartment.
Caution: Use only the supplied rechargeable battery or AT&T replacement
battery model 27910 (part number 89-0099-00-00). To purchase a replacement
battery, visit our website at
visit our website at
www.telephones.att.com
or call
call
1 (800) 222-3111.
In Canada dial
1 (866) 288-4268.
LOW BATTERY
1. Plug the small
end of the small-
er power adapter
into the jack on
the underside
of charger, then
route the cord
through the slot
as shown.
2. Plug the
large end of
the smaller
power
adapter into
an electrical
outlet.