Even if they contradict some passages I find the idea that is very commendable because behind.
How durable the battery really is and the higher capacity becomes noticeable can be established only after prolonged use. This experience I will grudge.
I did not count how many "original Nokia BL-5J battery" are sold on Amazon. Or fakes here are in circulation?
A dealer has assured me that he sold only reexports. But individually each battery checked. Believable that's not for me.
Equal to buy "replacement battery" So why not?
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Addendum 12.012014
"Battery-King" advises the battery is not more than 20% discharged. The Council should pay careful attention!
Because otherwise it may be that some USB battery pack and USB power supply the battery can not charge.
For about 15% capacity, the Nokia 5800XM turns off.
And then it profit a little when you carries parts called. And you still can not recharge the battery!
Therefore, you should insure that the entrained parts meet these requirements.
Or at least at two bars in the battery indicator charge the battery again!