If you're trying to find max load, I would encourage discharging the battery to 60% or so and re-installing it, and then stress the internal components to 100%. Keep in mind that your power adapter needs to not only power the system itself, but also the battery charging circuit. Your worst case load will be doing 100% utilization while charging a depleted battery.
> -----Original Message----- > From: [email protected] [mailto:hardware- > [email protected]] On Behalf Of Anthony Q. Martin > Sent: Monday, August 01, 2011 5:09 PM > To: [email protected] > Subject: Re: [H] PFC (power factor corrected) PS for PCs? > > The input is the (rms) voltage (fixed, depending on where on the planet > you are) and max current expected to be drawn from the wall socket. > Those are AC. > > The output is DC that comes out of the converter to supply your laptop. > It would be wise to meet these specs if you replace it, though you could > probably make it work if you got close (exact on voltage and close on > current), but you'd better not force the laptop to 100% load. Looks > like your laptop can draw 120W max. The input (wall) can easily simply > that @ 2A. > > The pf of 0.5 isn't bad according to your power company since you draw > comparatively tiny current and power and your leads are short, so > you're not losing huge amounts of power to heating wires and stuff. From > a purely 'green' POV, it could be considered bad...but you also have to > consider the cost of PFC on a unit like your laptop. Probably not much > to gain by it. > > Draining the battery won't cause your laptop to draw max power. For > that you need to load it up with some benchmark that drives the HDs, > CPU, and GPU as hard as possible. You could even remove the battery and > draw power straight from the wall socket. No good reason to stress the > battery. > > Yes, if you expect to run your machines at max load then you need to > budget accordingly. I don't run my machines at max load, though, so I > can get lots more time from a UPS than would be indicated by using max > load conditions. >
