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

From: Eero Tamminen eero.tamminen at nokia.com
Date: Mon Feb 18 12:47:07 EET 2008

ext Neil MacLeod 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,

I.e. you didn't restore a backup, configure a phone nor WLAN?

> 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

Igor, the 18 day number, is that until the device (is calculated to)
shut itself down, or until there's the low battery warning?

 > could my 9 month old N800 battery really have lost 1/3rd of it's
 > capacity?

And you verified that it really was the original N800 battery and
charger?  (I sometimes use the 770 ones, but I think its battery
has smaller 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

	- Eero

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