I’m surprised I’m not seeing more chatter about the inreach messenger here, especially compared to the zoleo. I’m currently in the market and have been comparing the inreach mini 2, inreach messenger, zoleo, and defy. Yes, the inreach messenger is 4 oz, but I’m leaning heavily towards it because of the battery life, and the ability to reverse charge.
I can get a lot of life out of my phone battery only using it as a secondary point-and-shoot camera and minimal GPS backup w/ caltopo, and on bigger trips I like to take my sony RX100 for better photos. Usually, I end up carrying a 2.4 oz or 4.8 oz Anker battery with me for my phone and camera. Since I won’t be using the inreach for active navigation or constant tracking, it will have a ton of juice left in it even on a 10-day trip w/o resupply. It becomes a multi-use item, allowing me to leave extra spare battery weight at home
The reverse charging does not work if the inreach’s battery drops below 25%. And it will only run for 20 minutes at a time. Even with those limitations, I could see it extending the battery life of my phone long enough to not need to take an Anker battery pack with me