Increased battery usage when using the update.sh diff

[avhm]

Not entirely sure where the bug lies here, but using the provided update.sh diff to append the current battery level to the webhook causes the battery life of the kindle to be cut in half (at minimum).

This happens for me on two different kindles (both PW4), both with new batteries.

...
if [ 1 -eq $CONNECTED ]; then
-     if wget -q $IMAGE_URI -O $TMPFILE; then
+     batteryLevel=`/usr/bin/powerd_test -s | awk -F: '/Battery Level/ {print substr($2, 0, length($2)-1) - 0}'`
+     isCharging=`/usr/bin/powerd_test -s | awk -F: '/Charging/ {print substr($2,2,length($2))}'`
+     if wget -q "$IMAGE_URI?batteryLevel=$batteryLevel&isCharging=$isCharging" -O $TMPFILE; then
        mv $TMPFILE $SCREENSAVERFILE
        logger "Screen saver image updated"
...

I'm unclear if this is an issue with my particular KUAL cocktail, but I'm curious if anyone else is seeing this issue?

If so, updating once per day or similar might be a good balance, reading/storing the 'sent' state in an env variable.