i ordered a scud battery from aliexpress as well. unfortunately i only got scud: scl-1109A 1350 mAh.

anyways they shipped it within 21days - no complaining about that - but after initial use i got a few error messages (cant reproduce - i ignored them) i am at a point, where my n900 is not charging at all.

i screened talk forums about solutions (a few other people here have problems as well) but until now i couldnot find something meaningful. maybe conclusion, battery is faulty is the right one.