Hi Msr. There's no app for SEQUEmatic so you can't have mobile phone properties trigger sequences directly.
But if you have an Android phone you could use somethink like Automate or Macro Droid. These could use your battery level as a trigger, then call a webhook or make a HTTP GET request to trigger a SEQUEmatic sequence using the customer webhook trigger.
Hopefully that's enough to get you started. Let me know how it goes!