Power Management

Eric Sandeen sandeen at redhat.com
Tue Feb 17 04:19:04 UTC 2009

brad longo wrote:
> Adam Williamson wrote:
>> On Mon, 2009-02-16 at 19:02 -0500, brad longo wrote:
>>> As I'm sure most of you know, leaving your laptop plugged in and 
>>> charging with a full battery charge is harmful for the battery.
>> No, it isn't. Where did you get that idea?
>> It's very harmful if you're using a charger which doesn't figure out
>> when the battery's full and switch to trickle charge mode but just keeps
>> dumping full charge power in - you'll kill the battery in short order
>> and, if you're lucky, set stuff on fire too. However, I know of not a
>> single laptop ever shipped with such a dumb charger. All laptops have
>> smart chargers, which sense when the charge is complete. Leaving the
>> laptop plugged in while fully charged is a perfectly normal use case
>> that all manufacturers expect and design for.
> I'm not going to pretend to be a professional when it comes to 
> batteries, but my battery was recalled about two years ago for setting 
> stuff on fire.  Now you know of one.

That was most likely a defective battery, not a dumb charger that kept
the battery on full current after it was charged, I think.


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