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Help with portable power supply


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I'm looking to upgrade my setup over time and I'd like a power supply that won't also need upgrading every time I get a new piece of gear.

The equipment I plan  I'll need to power will be an ASIair plus, an ASI 533MC, an ASI 120MM guide-cam and either an HEQ5 or an EQ6 mount.  The minimum I'd like to be able to power all this equipment for a minimum of 6 hours on a single charge.

I know that Watts = Amps * Voltage but  I just get lost when thinking about Ah or Wh and how much power is needed and does the 12V 5A rating on the ASIair cover the power required by the things plugged into it like the cooled camera?

I'd prefer a LiFePo4 battery but obviously they cost more, I'm currently looking at a few options and don't know if the lower power ones would be enough.

I feel like this 500Wh will surely be enough, maybe a bit overkill and is a good alternative to the Jackery 500 without the brand safety and no reviews https://www.amazon.co.uk/dp/B0B5NGD183/?coliid=I1QN7E8MU7GBW9&colid=2M3KWHBM794J5&psc=1&ref_=lv_ov_lig_dp_it

This FOX Halo 96K would would be the best one if it meets the requirement, cheapest lithium ion battery but it looks very transportable https://www.foxint.com/home/product/fox-halo-96k-power-pack?c=power-packs

Not sure about this one from Halfords but it's the cheapest and maybe it is also an option https://www.halfords.com/motoring/battery-maintenance/jump-starters/halfords-6-in-1-jump-starter-power-pack-654898.html

Thanks for any help!

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