Apps with 'Battery Monitor' feature

Monitor's battery capacity through the use of science.

Yet another cross-platform graphical process/system monitor.

[Opencandy installer. Be careful or choose the portable version: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/ ]

BatteryBar is a straight-forward battery meter that monitors the status of your battery and displays your batterys status in the taskbar. The more you use it, the more accurate it will become.

Shows your battery charge level (percent) as an icon in your status bar, with temperature, health, voltage, and time since plugged / unplugged in the notification area. It also has user-configurable alarms, logs, and widgets.

Displays all bluetooth devices' information in one simple dialog box.

Monitor your android devices battery usage.

BatteryMon is a battery monitoring software solution. It has been designed as an easy-to-use Windows based application that allows users to monitor the performance of laptop batteries and uninterruptible power supplies (UPS).

CoconutBattery shows you live information about the battery in your Mac, iPhone, and iPad including:

3C Toolbox is the comprehensive toolbox to save battery, tweak, tune, backup, secure and monitor any Android devices running any ROMs, any kernels.

Highly customizable Wayland bar for Sway and Wlroots based compositors.

BatteryInfoView is a small utility for laptops and netbook computers that displays the current status and information about your battery.

Stats Panel is a macOS app for monitoring system performance.

App that saves battery for mac computers by disabling some features automatically and throttling the CPU speed.