Panasonic KX TC1503B - Manual (Page 11)

Battery Charge
Place the handset on the base unit and charge the battery for about
15 hours before initial use.
IN USE/CHARGE/HOLD Indicator
Recharge
When the RECHARGE indicator flashes, or the unit beeps intermittently,
recharge the battery for about 15 hours.
•If you DO NOT recharge the handset
battery for more than 15 minutes, the
RECHARGE indicator will continue to
flash.
Battery information
After your Panasonic battery is fully charged:
Operation Approx, battery life
While in use (TALK) Up to about 6 hours
While not in use (Standby) Up to about 14 days
•Battery life may vary depending on usage conditions and ambient temperature.
•Clean the handset and the base unit charge contacts with a soft, dry cloth
once a month. Clean more often if the unit is subject to grease, dust or
high humidity. Otherwise the battery may not charge properly.
•If the battery is fully charged, you do not have to place the handset on the base
unit until the RECHARGE indicator flashes. This will maximize the battery life.
•The battery cannot be overcharged.
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