Install gkrellm-thinkbat by entering the following commands in the terminal:
sudo apt update sudo apt install gkrellm-thinkbat
Description:
ThinkPad laptops battery status indicator for GKrellM
This plugin displays: * power consumption * time estimation * remaining capacity percentage * charging information . tp_smapi kernel module is required as source of information about battery.
Homepage: http://people.ksp.sk/~rasto/gkrellm-thinkbat/
Version: 0.2.2-1
Section: universe/x11