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tomraider is offline tomraider
2009-10-04 , 20:11
Posts: 30 | Thanked: 9 times | Joined on Oct 2009
#31
With the talk about mAh, what about the differing voltages? i.e. a NiMH battery is typically 1.2v, so 2100mAh isn't the same as a 5v USB battery extender rated 2100mAh.
 
tomraider is offline tomraider
2009-10-04 , 20:16
Posts: 30 | Thanked: 9 times | Joined on Oct 2009
#32
I've had a look at the solar panels available after not having much luck in the UK with a fairly big twin solar panel charging 5x AA batteries... and the output of such panels maxes out at about 100mA in optimum conditions. Maybe good in LA or somewhere
 
geneven is offline geneven
2009-10-04 , 20:51
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#33
Charging at a distance seems to have become practical, judging from newspaper articles I've seen. Easier charging is almost as good as having a longer battery life.
 
shadowjk is offline shadowjk
2009-10-04 , 21:08
Posts: 1,258 | Thanked: 672 times | Joined on Mar 2009
#34

(3200mAh/1350mAh)* 6 hours = 14 hours and 22 minutes in extreme using conditions
now for the talk time:
(3200mAh/1350mAh)* 9 hours = 21 hours and 20 minutes of continues talking
You need to compare energy. 3.2Ah * 1.2V versus 1.35Ah * 3.7V:

3.84Wh vs
4.995Wh

In reply to another poster, n900 is not likely to function on charger without battery. The charge circuit isn't able to regulate power that way.
 
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f(x) is offline f(x)
2009-10-04 , 22:18
Posts: 98 | Thanked: 26 times | Joined on Sep 2009
#35
Originally Posted by mattiviljanen View Post
I second external battery packs. Lots of them available already, as previous links point!

I wouldn't use AA batteries, but rechargeable AA cells instead... Think of the environment! Put 4 or 5 of them (4.8V or 6.0V - someone prove me wrong, please!) together, add expensive, top-quality regulator, USB cable, some casing and you're done. First I laughed at chargeable chargers - out lout - but if they pack enough power, they just might save your week...

How about solar cells? Limited use cases, but hey, free power! Also widely available...
I mentioned AAA (AA is more bigger than AAA)
Check this: http://en.wikipedia.org/wiki/Battery...ttery_lifetime
Still, you are right about using battery cells.

By the way, I noticed that I didn't mention what I attended to in my previous post.
I was thinking of replacing Nokia original battery with 4 rechargeable AAA cells and connecting through a circuit where it also takes a power from a solar cells that is mounted on the battery cover (Or mounted in any better place?).

After all, I am sure people won't like to do this mod while their warranty remains unless someone made this in a good product and replaceable.
 
kamakazikev24 is offline kamakazikev24
2009-10-05 , 16:16
Posts: 40 | Thanked: 5 times | Joined on Sep 2009
#36
How about the cases with a battery built in like they make for the Iphone? As soon as the phone is put in the case the phone battery gets topped up.
 
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ysss is offline ysss
2009-10-05 , 16:40
Posts: 4,384 | Thanked: 5,524 times | Joined on Jul 2007 @ ˙ǝɹǝɥʍou
#37
@kamakazike: I think it'd be way too thick if they design it like the iphone's battery packs (the sleeve designs).
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Dirty Harry is offline Dirty Harry
2009-10-07 , 18:37
Posts: 40 | Thanked: 12 times | Joined on Oct 2009
#38
Nokia has a solution for this already (although not available with a USB pug yet)

http://www.mustaporssi.fi/files/midd...iddle_dc-8.jpg
 
shadowjk is offline shadowjk
2009-10-07 , 22:16
Posts: 1,258 | Thanked: 672 times | Joined on Mar 2009
#39
according to nokia, the n900 sales package contains an adapter so you can use your old 2mm charger with n900 too. i imagine dc-8 has that?
 
DaKing is offline DaKing
2009-10-10 , 00:18
Posts: 203 | Thanked: 12 times | Joined on Sep 2009
#40
how can u use the Nokia charger adaptor (CA-146C) i mean does it charge the battery when pluged ? and how can u charge that adaptor and how much power it contains ?
And is it true that when i get the device its better to charge it 12 hours before real usage ?
thanks
Last edited by DaKing; 2009-10-10 at 00:39. Reason: adding info
 
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