JFE Advantech MK-750ST-E Instruction Manual page 16

To confirm charge level of your battery, press the button next to the battery picture on your battery
pack. LED light turns on showing the charge level.
Approximate battery charged levels are shown as below.
LED light flashes in case battery level subceed 10%.
Enlarged
Battery charge level
Battery charged level
Battery charged level
Battery charged level
Battery charged level
75% or more
50% or more
25% or more
10% or more
Less than 10%
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