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Originally Posted by DarkArts
I wouldn't buy a Li-Ion/LiFePO4 battery by itself - get a complete power bank (which will have regulated outputs, over-current protection and charging management built in).
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I was looking at individual banks having a background in electronics but when I found many of the items I could get for good prices from China appear to be near dead used items (or no shipping offered) it turned me right against the idea. Personally, I'd still go with my own battery box for my own use but I'd be purchasing a LiFePO4 battery from a reputable source in Australia with warranty to do it and connect banks as I thought useful and to get the capacity I want. I wouldn't recommend anyone without a good working knowledge of battery systems undertaking it though, I'd recommend a commercially available unit.
While I have no experience with the Celestron branded items they seem rather expensive for what's in the box. Some items you pay for the branding on the item and I think the Celestron powerbox (or whatever it's called) is one such item.
I've read some good treports on the Bluetti systems, nothing but good actually. I'm not however familiar with the EcoFlow.
Now I'll have to research them for my own needs.
While I said I use my gear mostly in my back yard where I have access to 220 volt AC I also want to take my gear to 2 local farms where the skies are very dark and minimal traffic to affect my imaging. My own back yard lights up like a Friday night football game with the LED street light out the front lighting up 2/3 of my back yard. Out on both farms, both within a 10-20 minute drive the skies are remarkable and I have access any time I want, one phone call if that.