Ah, I googled 'librem 5 battery life' and trusted a random review which said 3500 (https://www.techradar.com/reviews/librem-5 https://www.techradar.com/reviews/

Ah, I googled 'librem 5 battery life' and trusted a random review which said 3500 (https://www.techradar.com/reviews/librem-5 https://www.techradar.com/reviews/librem-5) - probably should have found the official product page instead which very clearly says 4500 (https://puri.sm/products/librem-5/ https://puri.sm/products/librem-5/). Deleted that part of my comment.