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Are notebook batteries generally hot-swappable?
Is it ok to remove a laptop battery while the laptop is running on AC power?

I have an HP laptop and I'm wondering if it will mess anything up if I swap the battery while it's running and plugged in.

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It's fine. The laptop may run in a reduced performance mode while the battery is out, but it should return to normal as soon as the battery is replaced.

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  • Why would the performance be reduced?
    – wizlog
    Nov 27, 2011 at 0:30
  • @wizlog A lot of computers, particularly ones with intel processors, automatically downclock once you're on battery power. Nov 27, 2011 at 0:31
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    Although I fail to see why a removed battery, while using AC power, will make it have a lower performance.. Nov 27, 2011 at 0:34
  • @wizlog The AC adapter supplies power through a long, thin cord with a lot of inductance. The current can't increase quickly enough to compensate for sudden increases in CPU power consumption. To protect against a dangerous drop in voltage, some laptops down-clock the CPU when the battery is removed. Nov 27, 2011 at 1:21
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    @wizlog It makes no sense to respond to an explanation with a request for a source. But if you insist on a source, here's one and here's another. Nov 27, 2011 at 1:38

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