Original charger or not.
 

I have bought my N900 from second hand with a charger Nokia AC-10E. But I have some doubts if this charger is original one.Can anybody tell me what is the difference between original and fake AC-10E chargers (which are probably very often selling as original ones). For example I saw these chargers with only one screw. Is it different version of AC-10E ?

And I noticed that when I am charging my N900 using charge21.sh script, charging current is not constant (950 mA), but depends on current used by the phone. Also when voltage of a battery is higher, charging current is lowering. Is it correct or is it symptom of fake charger, which can not give stable current?

Re: Original charger or not.
 

The charging behaviour is exactly that way, by design. Enjoy your new-to-you N900 :-)

Re: Original charger or not.
 

Thank you for your answer. Could you please describe it more precisely. And how to distinguish original form fake charger.

BTW, my I have my N900 for almost 2 years, but so far I didn't analyse process of charging.

Re: Original charger or not.
 

DocScrutinizer (and others) made a study on this:

http://wiki.maemo.org/User:Joerg_rw/jrbme/

As for originality - I would say it's no big deal. As long as the charger can provide enough current and correct voltage (which yours clearly does), and has the short on D-/D+ pins (yours does too), then you're fine.

I would even bet most of the remaining N900 have not had the original charger treatment for a long time by now :)

Re: Original charger or not.
 

Another battery analysis (not exactly charging, but may help):
http://talk.maemo.org/showthread.php?t=81477