I like the spare battery solution myself. I keep two spares in my wallet, one of them the Mugen 1350mAh. I have to chargers at home that I got off eBay. I don't find that I forget batteries at home, and this way I always have a spare. There was one day when I went through all three batteries, but made it home before the third one gave out
And basically I don't notice the extra eight of two spare batteries in my wallet.
It has the additional advantage that I don't charge very often using the USB charger. There are threads about people experiencing the USB port popping out and other scary-sounding things like that. This way I am minimising wear on the USB port so touch wood I've reduced the chances of that heart-stopping thing happeneing.
I finally got my replacement battery (the one I got was faulty)..Here's my take on the Mugen Power Battery for the N900
Background Information on Phone usage:
Phone is overclocked to 700MHz
Phone set to 3G only
Connected to internet 24/7 with Skype, Gtalk and Push Email via Nokia Messaging always on
Multiple chats open, with several VOIP calls made
I also tweet using the tweego app
(basically I'm kinda of a heavy user, and coming from a Blackberry, I tend to IM alot. Also I do browsing with multiple browser open at a time. NOTE: I do not use the phone as a music player)
The phone would be disconnected from the charger 5minutes before leaving the house (around 9am). With the stock Nokia battery, I would have to set the phone to use GSM data and only switching to 3G when browsing the net, and the phone would show the low battery around 4 or 5pm.
Currently with the Mugen Battery, disconnecting the phone from the charger 5minutes before leaving the house, I could set the phone to 3G connection and the low battery warning would popup around 8pm. Heck I could even play Angry Birds with sounds on and not worry about the battery
Overall, I must say that I am happy with the Battery. It definitely give you more time to use the phone for other stuff like IMs, browsing the web, VoIP, etc.
The size of the battery with the case makes it quite nice to type with the qwerty keyboard. If you have the otterbox case, its not much of a difference in size between the two.
I could do more testing if you guys need me to on top of the crazy amount of IMs I do on this phone and let you know how long the battery last me for
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Edit: I added some more things I do with the phone on a daily basis. man my N900 is taking a beating isn't it? Also added the fact that the phone is overclocked (almost forgot that)
I am really happy that people care about their devices and their involvement in daily life...
well now after viewing all these posts i have decided to order a mugen battery after all...
but i have one more thing.... since i am planning to get alienware laptop (not trying to show off... )
i have heard just like this N900 those thing are battery suckers too... so i am also goin to get the Energi XP18000 cause i guess this is the most powerfull battery in the market yet...
so with that i will be able to charge my laptop as well as my n900... secondly i saw a few other batteries that are solar and more powerful but they are china made and... u know...
the good thing about Energizer Energi XP18000 is that u are paying good so u are getting good services.. 3 years of warrenty...
and as we know pretty much energizer is every where...
so that's that ifany one finds a more powerful portable power pack than the Energi please post a link...