To display the battery charge status on a laptop running FreeBSD, you can use the sysctl command with the hw.acpi.battery variable. For example:
sysctl hw.acpi.battery
This will print the current charge status of the laptop's battery, including the current capacity, rate of discharge, and estimated time remaining.
Here is an example of the output you might see:
hw.acpi.battery.life: 100 hw.acpi.battery.time: 7200 hw.acpi.battery.units: 2 hw.acpi.battery.rate: 0
In this example, the battery is fully charged (life: 100), and the estimated time remaining is 2 hours (time: 7200).
If the laptop is not using a battery (for example, if it is plugged in to a power outlet), the sysctl command may not return any information about the battery.