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Can I charge a 19V laptop from multiple USB ports? (ma.fellr.net)

submitted 1 month ago by [email protected] to c/[email protected]

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Can I charge a 19V laptop from multiple USB ports?

My laptop's charger is rated at 19V 2.1A. I was wondering if it would be possible to build an adapter which would allow me to charge it from a power bank, even if just slowly or via multiple USB ports.

I know you can buy adapters which utilise USB power delivery, but most outlets and powerbanks don't have PD yet.

@askelectronics #AskFedi #Electronics #DIY #USB

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[–] [email protected] 2 points 1 month ago (1 children)

If your powerbank has full power delivery support(it probably doesnt) then you can request voltages in 1/10v increments. This is very cool but you need a chip that communicates in your cable.

[–] [email protected] 1 points 1 month ago

I totally forgot about that :P That would be great indeed.

The PD trigger board may be much more involved/expensive though and I have not seen any budget battery banks supporting it. One can dream.

I expect consuming devices to adapt themselves to the three or four commonly provided voltages for the foreseeable future.