My N900 wasnt getting the battery life it used to so I decided to buy a new battery. I couldn't find anywhere locally selling a genuine Nokia BL-5J (and I didn't want to buy from feebay or other online sources) so I bought the one the shop I found had.It has the same markings as the Nokia except for the Nokia names and hologram.

What I want to know is if there is anything I should be looking for to figure out if A.The battery I got is any good i.e. not going to blow up on me or ruin my phone or whatever (but so far its been in my phone for a day or so with no indications of anything wrong) and B.whether its actually going to give me any kind of battery life (so far I have noticed that in about a day or so of use with a few phone calls and being connected to WiFi and to Skype all day, its gone from full battery to about 1/2 empty on the battery meter)

Basically I am trying to find out what I can do to tell if the $50 I spent was worth it or money down the drain