I am using Olympia K789s mobile phone and its battery is not working in a proper way. I have to replace the battery with a nokia cell phone battery. It is really very tough to find a nokia cell phone battery that can fit in my Olympia handset. but, there must be some batteries with the same size. Guys, would you please suggest me any nokia cell phone battery that comes in my mobile phone very easily. And if such batteries are available online, please post the website. I would not be very strict in terms of spending on nokia cell phone battery. Thanks.