Why your outdoorsy friend suddenly has a gummy bear power bank

Re:Why your outdoorsy friend suddenly has a gummy bear power... by cenamus on Sunday September 21, 2025 @12:44PM (#45324359)

Yeah, but pretty much every power bank uses lithium ion batteries (or used to, at least), so you use 3.7 average volts.

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Re:Why your outdoorsy friend suddenly has a gummy bear power... by hedora on Sunday September 21, 2025 @04:26PM (#45326332)

If you want to quadruple your amp hours without modifying the hardware, just treat 25% of the voltage gradient of each battery as your unit of measurement.

Alternatively, since this is USB-C, and we assume the marketing copy is honest, use the max voltage USB-C can deliver: 20v.

So, draw 20V from this device and measure the amp hours it outputs.

Wh is really the only sane way to go.

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Re:Why your outdoorsy friend suddenly has a gummy bear power... by syedkarim on Sunday September 21, 2025 @04:29PM (#45326347)

Lithium NMC, which I think is the most common, is 3.7V. Lithium iron phosphate, which some power packs do use, has a nominal voltage of 3.2V.

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Re:Why your outdoorsy friend suddenly has a gummy bear power... by addaon on Sunday September 21, 2025 @05:14PM (#45326708)

And LTO, which is what I actually want, is 2.3 - 2.4 V.

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