Checking The Remaining Battery Power - Fujitsu LifeBook C-7651 Manual

Critical Point
If the Main switch is off, turn it on.
When the room temperature is low, the battery operation time becomes shorter.
When the battery has been used for a longer period, the battery operation time duration
becomes shorter because of the charging capability deterioration. If you notice that the
operation time length becomes extremely short, replace the battery with a new one.

Checking the Remaining Battery Power

You can check the remaining battery power by looking at the remaining battery power indicator
in the status indicator LCD when the power is on or during charging.
Remaining battery power indicator
This means that the remaining battery power is between about 76% and 100%.
This means that the remaining battery power is between about 51% and 75%.
This means that the remaining battery power is between about 26% and 50%
This means that the remaining battery power is between about 13% and 25%
(This represents 0% to about 25% of remaining battery power during charging).
This indicates a low battery status
(the remaining battery power is about 12% or less).
This means that the battery is completely exhausted
(The remaining battery power is 0%).
Critical Point
The remaining battery power indicator may show a different indicator value from the actual
remaining battery power depending on the environment of use (temperature, battery usage
and recharging cycle numbers, etc.) because of the characteristics of the lithium ion battery.
Charging does not start even if the AC adapter is attached when the remaining battery
power is 90% or more. Charging starts when the power is 89% or less.
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blinks.