Indeed, with that same 30 percent remaining,
watch mode estimated a whopping seven days of use.
Not exact matches
Inside you'll see your battery percentage, an
estimate of the time remaining, and two options: Smart power saving and
Watch mode.
The
estimate likely factors in a «
watch only»
mode that the S3 goes into after it reaches 5 percent battery, which is supposed to display just the time for another 24 hours.