According to Gsam smart notice has used 1 second of CPU time in the last 12 hours. The battery usage is listed as 0.0%. I assume the weather widget was similar. I'm still trying to nail down all the battery wasters. The change from weather widget to smart notice is my most recent change. I see no significant change one way or the other switching to smart notice. My daily usage never varies much so it is easy to see when a change is made to impact battery one way or the other.