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may have to tweek, not sure what you want....... #battery on line or not ${voffset -15}${if_existing /sys/class/power_supply/AC/online 0}${color white}AC is${color red} off-line $battery ${else} ${if_existing /sys/class/power_supply/AC/online 1}${voffset -15}${color white}AC is${color green} on $bat...

Notice this post is old but may help someone.
Tried this a few years ago had to output to a file..
I decided to looking again at conky been a while.
${execpi 3600 gcalendar --output json | jq . > ~/.conky/.../file.txt}