SUUNTO EON STEEL - Manual (Page 26)

The battery icon in the upper-left corner of the display shows the
battery status. To the right of the battery icon is the estimated
remaining dive time in hours.
Icon Explanation
Estimated remaining dive time is 27 hours; no
immediate need to recharge
Estimated remaining dive time is three (3) hours or
less; recharge needed
Estimated remaining dive time is less than one (1)
hour; recharge immediately
Battery is charging, showing current charge level as
remaining dive time
When the charge level drops below 2 (two) hours, you cannot start
a dive with Suunto EON Steel . A pop-up message indicates
recharge is needed.
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