What lithium ion battery to use for homemade power box? : overlanding

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What lithium ion battery to use for homemade power box? : overlanding

Hi all, in the past when power banks were super expensive, I booty fabbed my own with an old car battery from my Jeep JK, a battery box and an 750w

New Storage System and Dual Battery System in My Rig
Original plan was to cap off our 2 week road trip with an alpine lake hike to cool off in Nevada. Forecasts change quick. : overlanding
My coldest camp site so far (-7 degrees Celsius) Mt Matlock, Australia : overlanding

Hi all, in the past when power banks were super expensive, I booty fabbed my own with an old car battery from my Jeep JK, a battery box and an 750w inverter and it worked pretty well. It generally lasted about 3-5 days depending on use. I added an image to show what it looks like. I used it to charge my camera batteries, CPAP batteries and laptop. While it worked well, the downside was that it was heavy and since the old car battery died last year, I’m thinking of going with a lithium ion battery but not sure which one to choose. Any ideas or brands that anyone would recommend?

EDIT: don’t think the image went through so here’s the link
[Imgur](https://i.imgur.com/IZCXA15.jpg)

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