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Step 3: Preparing the battery pack for the handset (continued)
Battery duration
A fully charged battery pack lasts for about:
• 7 hours when you use the handset continuously.
• 7 days when the handset is in standby mode.
Battery life may vary depending on usage condition and ambient
temperature.
Notes
• The CHARGE lamp of the base phone is always lighted when the handset is
placed on the base phone, even if the battery pack has been fully charged.
• The battery works best when charged after several calls.
• The battery pack will gradually discharge over a long period of time, even if
the handset is not in use. If you leave the battery pack in the handset without
charging it, the battery pack will be completely discharged.
The battery may require several times of charges to recover to its full
capacity.
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 a Sony BP-T23 rechargeable battery pack.