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On 9 Sep 2014, at 14:03, Gordon Henderson <gordon+lug@xxxxxxxxxx> wrote: > On Tue, 9 Sep 2014, Joseph Bennie wrote: > >> Hi All, >> >> My father in law just dropped off his laptop without the PSU for repairs - does >> anyone know if i can hook it up to a generic supply - or will it need to be a >> dell? > > Most laptops use a 19V PSU these days. The "trick" is getting the right connector. > I've just bought a couple of "universal" adapters to power a laptop off 12V - and > they came with about 2 dozen connectors… +1 - yep that was the main issue. > >> If the latter has anyone got one in their junk box? >> >> I’d go an get his but i just can’t face the spanish inquisition about why he >> “...does not understand why his battery only works for 40 mins - he’d always had >> it connected to the main power." type questions. > > Old battery - they don't last forever anymore. > > Some older ones were prone to overheating when left powered up 24/7 which doesn't > do batteries any good. I didn’t have the heart to go into the the point that a laptop battery degrades when powered up 24/7. because it tends to cycle the top 5% of charge, and the power up is never 100% effective so ever day he loses a little capacity. > > Gordon-- > The Mailing List for the Devon & Cornwall LUG > http://mailman.dclug.org.uk/listinfo/list > FAQ: http://www.dcglug.org.uk/listfaq -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq