My Onyx Boox Max Lumi certainly has excellent battery for my purposes.

Also owner of a ReMarkable 2, will be reviewing both of them soon as I think they are an interesting niche tech, and are big investments for people.

Please share here on HN when you do the comparison. This class of device (somewhere between a Kindle and an iPad) are of interest to me, but the market is a little immature and I don't feel like being a beta tester.

A comparison of both would be very appreciated. I've been trying to decide which to get.

If you could also try and to a pcap to make sure nothing funky is going on with the Onyx ROM that would be amazing.

I also will chime in that I would like to see a comparison.

Hard to say because I have auto sync set up to keep my PDFs up to date which runs every 15mins. And Wifi is mostly on. But with that and moderte usage I may need to charge it between 7 and 9 days. But you can probably do optimize the settings more (after what time does it disable wifi when it started sleep mode, when does it start to shit itself off, front-light adjustments, etc.)