Ok, Nokia Lumia 900 has a Standard battery, Li-Ion 1830 mAh (BP-6EW) and the nokia n9 has a Standard battery, Li-Ion 1450 mAh (BV-5JW) there is a 380 mAh difference between lumia 900 and nokia N9. do you guys think it's a wise idea to buy a lumia 900 battery on ebay and put it in a Nokia N9? Do you think it's worth it? Share your thoughts with me. Cheers.