Operation without battery (GTA02)

Jim Morris ml at e4net.com
Wed Jul 23 00:29:38 CEST 2008

Andy Green wrote:

> Jeffrey, if you are interested about what the battery experiences, there
> are a bunch of goodies from the Coulomb Counter in the battery
> accessible down /sys/class/power_supply/bat, just cat them.  These tell
> you the battery's view of what is going on directly.
> # cat /sys/class/power_supply/bat/current_now
> is particularly interesting, this is the flow of current out of (+ve) or
> into (-ve) the battery in uA.  These values come fresh from the Coulomb
> Counter each time, but that device itself updates its registers only
> every few seconds.

Is there a Wiki page or docs that explain what each register is and the units it refers to?
especially in the .../power_supply/bat/... area which seems to have very pertinent information.

Do the values appearing in the /sys/classes/... files differ anyway from what the hardware provides 
or is it tweaked by the kernel?


Jim Morris, http://blog.wolfman.com

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