have also been looking at these: https://www.takealot.com/wibox-lithium-lifepo4-wifi-ups/PLID92692456 I think the battery is replaceable on this one which would be pretty cool.
Edit: the batteries are replaceable.
That's an enclosure plus a battery.
You can for example buy this:
Bluenova 22Ah 13V LiFePO4 Mobile Power Series 280Wh Lithium Iron Phosphate Battery – LIVESTAINABLE®
Introducing the BN13V-22-286WH, the third largest battery in our 13V MPS series. This battery is ideally suited for powering small 12VDC loads typically found in outdoor and leisure applications, as well as in various small backup systems.
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That would give you a 280 Wh battery with 3,000+ cycle life. One may need something like this to play with one's network devices:
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South Africa's leading online store. Fast, reliable delivery to your door. Many ways to pay. Shop anything you can imagine: TVs, laptops, cellphones, kitchen appliances, toys, books, beauty & more. Shop the mobile app anytime, anywhere.