Yokogawa FieldMate - Manual (Page 290)

<I ISA100 device configuration>
I-36
IM 01R01A01-01E 9th Edition : May 31, 2013-00
Table I-5-5
Display Meaning
Battery 75% or more More than 75% of the battery remaining
Battery 25% to 75% 25% to 75% of the battery remaining
Battery 25% or less Less than 25% of the battery remaining
Line Powered Power supplied by external power source
When battery remaining capacity is lower than 75%, Device Status display turns to Warning.