Dell Inspiron 11z (1121, Late 2010) - Manual (Page 28)

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Using Your Inspiron Laptop
Status Lights and Indicators
Power/Battery Indicator Light
Indicator light status Computer state(s) Battery charge level
AC adapter solid white on
off/hibernate charging
<=90%
breathing white standby charging
off off/hibernate >90%
Battery solid white on >=10%
breathing white standby >=10%
solid amber on/standby <10%
off off/hibernate n/a
NOTE: The battery is charging when the computer is powered using the AC adapter.