Just a simple battery meter app, with no ads, since I hate ads myself. Has a live tile and a lock screen icon, I have the maximum set for both of those as 99 since 100 does not allow the icon to show in the lock screen. I also have different icons depending on the percentage on the live tile. Also has graphs that can be zoomed and panned so you can see all of the recorded percentages. I have been personally using this for a couple of years and have finally added charts and thought I would share.
Scan the following QR code
to get BatteryStats on your device