This article shows how you can easily inject a generic key/value into Google Cloud Monitoring and set up alerts on it. I use it to alert on disk space, and now also low battery!

This morning I was in London, and I forgot my charger at home. With plenty of time but 🪫 little battery, I thought: hey! I need to have a way to predict when my battery is low! And I need to do it in a totally overkill way!