Sony SPP-M920 - Manual (Page 13)

Battery duration
A fully charged battery pack lasts for approximately:
• 7 hours when you use the handset continuously.
• 7 days when the handset is not in use (less during out-of-range).
When the battery pack needs charging:
• The phone will beep when it is activated.
• The display will change to "LOW BATTERY."
Notes
• The battery pack will gradually discharge over a long period of time, even if
not in use.
• The Caller ID list, speed dial numbers and the security code wilt be retained
even during loss of battery or AC power.
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Battery for the base phone
A spare battery can be purchased and installed in the base phone. This
battery serves as a ready standby for the handset and, if needed, will
provide operational backup for the base phone in the case of a power
failure. Calls, except speakerphone and caller ID with call waiting, will
still be able to be placed and received without interruption for up to
battery pack is installed in the base phone and charging.
• A battery pack can be charged in the base phone, but not as quickly as when
installed in the handset. A full charge of the second battery will require about
24 hours when charged in the base phone.
When to purchase a new battery pack
If the battery lasts only a few minutes even after 8 hours of charging,
the usable life of the battery has expired and needs replacement.
Contact your local Sony authorized dealer or service center, and ask
for Sony BP-T23 rechargeable battery pack.
Getting Started I 13®