BatteryBot Pro monitors and shows your battery charge level (percent) as an icon in your status bar, with how much time you have left, temperature, health, voltage, and time since plugged / unplugged in the notification area. It now also has a 1×1 app widget. The Pro version also has user-configurable alarms, logs, mA current information, and a large (4×1) widget.
– No ads (why would you want a battery app with ads?)
– Exact battery level in the task bar
– Or hide the task bar icon, keeping notification in tray — or turn notification off completely and just use widgets
– Multiple icon set options
– Automatic time-remaining estimates based on recent usage
– Small (1×1) circle desktop widget
– Very lightweight (please email me if you think otherwise, and I’ll help you figure out what’s wrong — I promise this app will not drain your battery!)
– Well-tested and supported on all major versions of Android (4.1 through 8.0; Jelly Bean through Oreo) and form factors (small phones, medium phones, large phones, 7-inch tablets, 10-inch tablets).
– Open source
– Alarms (fully charged, charge above X, charge below X, temperature above X, or health failure)
– (On devices that allow it) Icon colors (including fully configurable green, amber, red, and black icons)
– (On most devices) Electric current (mA / milliamp /milliampere) reading to/from battery on supported devices
– Large (4×1) desktop widget
– Battery logging. You can log the battery state (charge, status, voltage, temperature) and browse the logs on the phone or export to CSV.
– Control the notification priority on Android 4.1+ (For example, you can set to “minimum” to hide the icon but keep the notification in the tray.)
– Lots of configurability of behavior and appearance.
– The charging indicator (the bolt under the number that indicates when the device is being charged) for the sets that have it is optional in the Pro version.