[maemo-users] What is Best practice for Battery Longevity on N8X0?

From: Neil MacLeod gmane at nmacleod.com
Date: Fri Feb 15 04:01:54 EET 2008
Igor Stoppa wrote:
> On Thu, 2008-02-14 at 14:08 +0100, ext Frantisek Dufka wrote:
>> Igor Stoppa wrote:
>>>>> n800: 18 days
>>>>> n810: 27 days
>>>> Impressive, any details where the savings were done? Is this strictly HW 
>>>> related and the n800 has same OS2008 version as N810?
>>> it's both hw and sw; the sw part is about fixing wrong settings in muxing,
>>> pullup&pulldown and disabling voltage regulators when not in use or OMAP
>>> is in retention.
>> Just to confirm, these 18 days are already on N800 with OS2008 and with 
>> those sw issues fixed?
> I don't remember if i checked exactly the sw version that is public atm
> but if it wasn't then it was close enough.

I can't imagine those fixes are in the current software, or anything close to them as a few weeks ago I performed an idle run-down test on an N800 with 2.2007.50-2 (a freshly flashed device with no configuration changes whatsoever, so essentially a factory fresh install with a fully charged battery). After 12 days and 2 hours[1] the low battery alarm began to sound - that is just 2/3rds of what you are saying is possible so why such a large discrepancy - could my 9 month old N800 battery really have lost 1/3rd of it's capacity? Or can this difference really be down to component variance (the tested N800 is from March 2007)?

1. https://bugs.maemo.org/show_bug.cgi?id=2602#c20

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