benjamin m. schwartz wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Mikus Grinbergs wrote: > > I take this to mean that *something* was draining some > > power for the two days the XO was sitting in its "shut down" state. > > All rechargeable batteries lose stored energy over time. The phenomenon > is called "self-discharge". It is sometimes modeled as a large (but not > infinite) resistance in parallel with the battery.
but self-discharge takes place whether a battery is installed in the laptop or not. i suspect what mikus is seeing is the effect of the embedded controller (the "EC") needing a small amount of current in order to be able to observe the power button press, which tells it to turn the rest of the system on. mikus -- when you power up the system after two days, what does sugar, or olpc-pwr-log, tell you about the state of the battery? i suspect it's pretty close to full, but that it needs a small "top up". (which is why the light turns yellow.) (i'm sure richard has numbers for the power-off drain from the EC, and for the powered-off shelf life of a fully charged laptop.) paul =--------------------- paul fox, [email protected] _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
