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

submitted 2 months ago by fell@ma.fellr.net to c/askelectronics@discuss.tchncs.de

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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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[–] Tolookah@discuss.tchncs.de 3 points 2 months ago

What's the laptop? It looks like someone makes a handful of adapters for different laptop barrel connectors to USB c PD.

Using multiple ports isn't really an option, because all the ground (0v) lines on a USB power Bank will be tied together, so stacking them would only prove to short+V to Gnd. If you had multiple power banks, and did not tie the chassis lines together (because those are also often shorted to 0V), maybe this would work it likely depends on the adapters used, but that would involve you traveling with a power strip, 4 adapters and the monster cable.