Sony SVD1121BPXB - Manual (Page 192)

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Notes on an Extended Battery Pack
This topic explains battery charging behavior when an extended battery pack (not supplied)
is attached to your VAIO computer in addition to the installed battery pack (the primary
battery pack).
With the extended battery pack attached, the battery packs charge in the following sequence.
(When the battery care function is disabled)
1. The primary battery pack charges to about 80% of its battery capacity, then the
extended battery pack starts charging.
2. The extended battery pack charges to about 80% of its battery capacity, then the
primary battery pack starts charging to 100%.
3. The extended battery pack starts charging to 100%.
The battery power of the extended battery pack is used first.
Note
When the extended battery pack is attached to your VAIO computer with the remaining
battery power low, the extended battery pack status may not be displayed on the
computer screen or the charge indicator light status may be a battery error. In such a
case, detach the extended battery pack and charge the extended battery pack with the
AC adapter.
© 2012 Sony Corporation
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