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You need at least 5V DC for backwards compatibility with devices that expect that.
by dTal 4y ago
You need at least 5V DC for backwards compatibility with devices that expect that.
- dheera 4y agoNo, you don't. Get an adapter with a voltage converter, just like you would if you need to plug a 120V-only device in a 240V outlet. 120VAC outlets have not changed in 60 years and that's owing to the fact that they output just straight-up power, no negotiation BS.
- cesarb 4y ago> 120VAC outlets have not changed in 60 years Where I live, 120VAC outlets last changed less than 20 years ago, with the adoption of the new NBR 14136 standard for plugs and sockets.
- eternityforest 4y agoVoltage converters are big and not that reliable at the consumer level. Putting the power supply in something replacable is a good thing. Going from 19 to 5 would be an extra conversion step. Plus, 19v is too low. USB does 48v for the 240W mode. You could use more current, but then you are wasting copper and making connectors bigger and heavier. I used to not be a fan of negotiation but it seems that it's highly reliable these days, stuff isn't getting fried because of incorrect voltage selection.