battery charging and discharging graphs

Flemming Richter Mikkelsen quatrox at
Tue Aug 26 19:51:44 CEST 2008

On 2008-08-26, Andy Green <andy at> wrote:
> Somebody in the thread at some point said:
> | Hello everybody,
> |
> | i have made a couple graphs of battery charging and discharging.
> |
> | So in case you are interested a have published my results on my blog:
> | .
> There
> | are a few words in Czech which you can just skip. The graphs was made on
> | fso-testing image from 20. August 2008 with disabled "Suspend" and with
> | turned on gps and wifi. On the blog are also links to script which
> generates
> | graphs.
> |
> | I have plan to make more measurements of discharging with different power
> | management settings.
> |
> | I'm not sure if you guys have made tests like is this, so please let
> me know
> | if this information was useful for you.
> No I never saw it before, they mainly look like I would expect.
> CURRENT_NOW during charging is interesting it shows the transition from
> constant current mode at the start to constant voltage mode where the
> current needed to maintain the charging voltage then declines as it gets
> more and more full.
> Pretty cool!
POWER_SUPPLY_CHARGE_FULL does not look very accurate. It
is always around 1.2A??

Anyway, the rest of the graphs was more or less like expected,
but it was very nice to them. Nice work:)

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