I'm about to leave on my first multiday trip on Monday.

I will be traveling on mostly hiking trails and have made a GPX file for me entire route (around 400km). For my previous day trips or overnighters i have followed the route using the app "Ride with GPS".

What i am concerned about on this longer trip is battery life. I also use my phone as a camera and posts to instagram along the trip. That can be very battery consuming.

I have 2 power packs with me, one with 4500mAh and a larger one giving me 20000mAH

The trip will take something around 5 days and I am looking for some advice how to limit battery usage and still be using the phone as a tracker/navigator.