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How to convert Watts per Hour on a laptop (external battery)

Asked by smyers051972 in Business Travel, PC Laptops, Power Supplies / UPS

Tags: external laptop battery recharger

Hi all,

I travel a lot and find that a lot of planes I am on dont have the 12V plugs on them and figured I would buy a universal external battery for my laptop. It runs 19V @ 4.74A. The battery I am eyeballing is 73 watts/hour. If I calculated this correctly I would need 90-91 watts/hour to run the laptop, it claims to have 3-4 hours run time on it which is about what I will need, that would be about 7-8 hours run time in total. Usually I can plug in some where in about 8 hours to recharge.

Could someone perhaps spell out for me what 73 watts/hour should be able to do for me. I imagine that if the laptop is off it can recharge better or would this simply just slow down the time it takes to discharge the battery?

Thanks!

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How to convert Watts per Hour on a laptop (external battery)

Asked by smyers051972 in Business Travel, PC Laptops, Power Supplies / UPS

Tags: external laptop battery recharger

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