Is it possible to send an email to myself when the laptop is on low battery power?
I'm always online with my Android phone, but not always in front of the laptop, and sometimes I'm missing the warning.
Perhaps a Python or Bash script?
There is a Ubuntu software called Cuttlefish which enables you to create some tasks when some events occur on your computer. Perhaps you may create a task which sends you an email when the battery is low.
You can install it by writing it in a terminal :