Those batteries I bought have the exact same look with the original one (with that Nokia hologram stamp etc), and they were in sealed, quite original looking packages. So I really am quite sure that they are unused. But of course they may be very old anyway. But do you think that only the storing for that loong could have affected the capacity that much? If they have been manufactured, like, in 2009.

I have seen many batteries of different devices to wear out. Usually it doesn't affect to batteries' maximum capacity (or at least those devices don't tell me so), but they are still able to charge up to 100%. They just get empty faster and faster.

That's why I am asking. Because for me the way these batteries act is new. So I'm wondering that:

- Is the N900 so smart that in can properly calculate the decreased capacity of those old batteries?

OR

- Is the N900 so stupid that it fails to calculate the batteries capacity? Is there any way to help it in doing this properly?

I think the second option could be more correct, because, like I said, those decreased capacity batteries last roughly as long than the not-so-decreased one. So I'd say that the problem is not in the batteries but in the way the device reads them.

Last thing: You spoke about rejuvenating the batteries. How could this be done? I have done some rejuvenating for car batteries, by feeding some constant 14V current to battery before connectng it to a smart charger... Should I do something similar with around 4V of current?