I don't think you can format the title in anyway, I've never seen that in an AppleScript in years.
Regarding triggering the action only when battery reaches 10%, I think refer to this conversation
You must have a deja vu!
The last script pasted there seems to have the same
tell application "BetterTouchTool"
execute_assigned_actions_for_trigger "PASTE_THE_UUID_HERE"
end tell
you can replace that UUID with the one for this one and it should work!