It works fine and hasn't given me any indication that it's not a fully functioning battery. My only concern is that it's not completely brand new. The hologram and the battery itself has some tiny scratches on it and it didn't come in Nokia brand packaging (although the previous one I purchased did). This one came in a little resealed pouch. Also the electric receivers look like it's been in and out of another component because of the wear of the metal. Regardless, it's a good price and hasn't discharged quickly. Hopefully it won't and that's all that matters.