This perhaps could be of interest to You @AmpBenzScientist .
A mobile phone or perhaps a smartphone with a li-ion battery lasting up to 1 month.
https://blog.flipperzero.one/1-month-battery-life-with-firmware-update/
@PawelK Infinitime had the same problem with the PineTime and its Nordic chip.
A cell phone would be very different. What Mr. Lee is working on could actually get closer to it if the Pinephone had a low power screen and a larger battery. There is likely a problem with that hardware revision too. It has enough control to where it charged at 5V 3A without issue for me. Two microcontrollers control charging of the device.
Two micro-controllers? WTF?
On low power side from my ie SW perspective, i just suspect (AS yet), java, JavaScript, and unwanted and unneeded animations on web (including via elements of CSS and SVG) suck dong, just as user-tracking and web-ads and app-ads.
Also on datalimiting, so both bandwidth and CPU, vector + text formats for many images + tinysvg-esque projects will kick ass.
Scrolling doesnt help here, but i would think of paged HTML view, and DLing per page more or less. Chunking division and serving effort moves to server, and displaying would mean rendering a single PDF page more or less.
@AmpBenzScientist
Cool idea.