Yea, back in the day, when first phones and laptops were coming out, the tech was different, and was better to fully discharge/charge the battery. Nowadays it's the opposite, but the mith still survives
An easy analogy for batteries nowadays is to see them as an elastic completely relaxed at 50%. At 0% or 100% the elastic would be fully stretched. You want to avoid that to maximize its life
And there are cheap options on aliexpress that are solar powered
Go for the second hand 1l pcs. They are better and cheaper (but less sexy) than the zimaboard. The ones with a i3-7100T should handle like 10 transcode, if 1080p. Chrapes I've seen on ebay was a prodesk 50bucks. But it's a rare deal
Do you have a secondary monitor? How do you handle sleep? Using laptop? How do you close your lid and get everything to hibernate/sleep? Those are my biggest gripes right now
How familiar are you with torrents? I can send you an invite to a private tracker full of 4k remux documentaries.. I just think you are better with 1080p if watching on a laptop. For me at least, I can't tell the difference (and I have a 4k screen on my laptop)