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What are the implications of running a laptop via the battery connector instead of the DC jack? (feddit.nl)

submitted 1 week ago* (last edited 1 week ago) by [email protected] to c/[email protected]

50 comments fedilink hide all child comments

Long story short, my laptops DC input is no longer working. Yes, I've tested every aspect of the power supply. I even measured the motherboard input voltage, and it is being properly fed. I suspect a faulty DC-DC converter.

So, I had this idea of removing the battery permanently, and instead emulating it with a power supply with matching voltage. I don't really need the battery anyway (I mostly use a laptop for the form factor).

In theory, the laptop will then think it's running off of battery power. Permanently. Are there any consequences in terms of performance that could arise from this? Of course, the power settings will need to be adjusted, but beyond that I'm wondering if there's a hardware aspect that I cannot control.

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[–] [email protected] 14 points 1 week ago* (last edited 1 week ago) (1 children)

If it's from the last few years and the barrel input has an adjacent usb-c port it may accept usb power delivery

The port may not even be labeled for it

[–] [email protected] 3 points 1 week ago* (last edited 1 week ago) (2 children)

It just so happens that there's a USB-C close to ir, but I think that's just a coincidence as this laptop eats a lot more than even the beefier USB chargers. 20V, 14A. Some sort of square 4 pin connector I haven't seen elsewhere.

[–] [email protected] 4 points 1 week ago (2 children)

ouch, usb c caps out at 100W afaik

[–] [email protected] 7 points 1 week ago

The standard is up to 240w now

[–] [email protected] 3 points 1 week ago (1 children)

Nah my laptop is 180w on usbc

[–] [email protected] 3 points 1 week ago (1 children)

oh neat, there's a new standard that pushes up to 240W

[–] [email protected] 1 points 5 days ago

though laptops are notorious for proprietary charging.

I've seen dells that can charge via USBc at full 140w but only on a Dell dock. On any USB PD charger it will only do 60w, and complains about it as it throttles everything.