Magic Mouse battery life
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From: Rowland McDonnell on 19 Jul 2010 23:40 Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> wrote: > jim(a)magrathea.plus.com (Jim) wrote: > > >Peter Ceresole <peter(a)cara.demon.co.uk> wrote: > > > >> Coincidentally I've got a relatively new set of rechargables of the > >> right kind; the real pain in the bum is that, as far as I can see, if I > >> lose the mouse's wireless connection while changing the batteries, I > >> need to plug in a wired mouse to reconnect. Which seems naff to me... > > > >I've ot seen that here. Changing the batteries on my Magic Mouse simply > >involves it losing conection for about a minute, then it reconects. > > > >Incidentally, if you use rechargables you probably won't get a 100% > >charge reading - more like low 80's. I guess that's due to rechargables > >being 1.2V rather than 1.5V > > And most rechargables discharge slowly over a month or two whether you > use them or not, which is why I don't tend to use them in low power > devices like > keyboards. Some modern NiCds can hold their charge for over a year - the HP32E I have in the desk here is living proof of that. I just bought a `no obvious brand' battery pack for a cordless phone from Maplins, reworked it so I could stick two of the three cells in my HP32E[1], and - well, I've never seen the like, holding charge that long. btw, I *think* they're NiCds, not absolutely sure. Nickel metal hydride loses its charge quite quickly - but there are specials that claim to hold charge for much much longer. Lead acid: well characterised self-discharge rate, expect to need to re-charge every month or so if out of use IIRC. Check maker's data sheet... And lead acid cells are about 2V nominal each. ObMac: lead-acid Cyclon cells are what you need to revamp yer Mac Portable's battery pack. Rowland. [1] Which takes cells that are `AA diameter and AA long, less the knob on the end'. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking |