battery meter

Change-Id: If4c73f24531cfc4a6020dde411eec64dc4a29f99
derp

Change-Id: I7cffb5023dddc3283d3870c82e1f9ff1843ce861
check for nullpointer

Change-Id: I15b86be07d85e709fd3b79395a59c5882b46a4e8