Panasonic KX-TC900-B Operating Instructions Manual page 17

Replacing the handset battery with the spare battery
To prevent memory loss, replace within 5 minutes
| Remove the handset cover, then remove the battery
2 Replace the handset battery
with the spare battery in the
base unit
@) Remove the spare battery
®© Insert the handset battery
In the base unit observing
the proper polarity
3 Install the spare battery in the
handset observing the proper
polarity
e When you finish, close the
handset cover
e If the TALK/BATT LOW indicator flashes slowly even when the handset
battery has been fully charged, it ıs time to change the battery with a new
one Remember to fully charge the new battery after battery replacement
e Please use only a Panasonic P-P592 (KX-A92) battery For accessory
order, call 1-800-332-5368