Editor's Review
A widget this small has one job: put the battery percentage on the home screen in a shape more interesting than the status bar icon. Emoji Battery Widget does that by swapping the usual bar for emoji or coloured graphics that change as the charge falls, across a handful of sizes and styles chosen when the widget is placed.
For anyone building a home screen around an icon pack or a wallpaper theme, that is a reasonable thirty seconds of setup. It is free, it is small, and it asks very little.
The 3.18 average is the part worth weighing. Battery widgets suffer chronically from Android's aggressive background restrictions, and the usual reports follow: widgets that stop refreshing, percentages that go stale, and displays that blank after a reboot until they are placed again. Advertising in a free personalisation app of this size is standard rather than surprising. Treat it as decoration, not as a readout you can rely on.
Features
Battery level displayed as emoji or coloured graphics
A choice of widget sizes for the home screen
Style and colour options set when placing the widget
Charging state reflected in the displayed icon
Pros
Free and quick to set up on a themed home screen
Small enough to sit beside other widgets without crowding them
Cons
The 3.18 average points to widgets that stop updating
Stale readings after a reboot are a common report
Advertising comes with the free package
Purely decorative; it adds nothing the status bar does not already show
