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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] 4 points 1 week ago (1 children)

I would venture a guess that as long as you match the voltage and current ratings of the battery then power itself wont be an issue, but there may still be some specific (possibly proprietary) data exchange that happens between the battery and the mainboard — depending entirely on the model of laptop — that confirms that the battery is legit, or to get diagnostic information. I don't really have example of a laptop that does restrict the battery in such a manner, but this is just a concern that I have off the top of my head that I feel could be in the realm of possibility, and is worthy of concern. Potentially, it could function similar to how Apple iPhones will complain if third party components are used [1].

References

"About genuine iPhone batteries". Support. Apple. Accessed: 2024-10-25T20:27Z. https://support.apple.com/en-ca/103269.

[–] [email protected] 2 points 1 week ago

This was a concern of mine as well, but from the looks of it, the battery is really simple with no apparent on board intelligence.