Hey, I whould not trust it really if it comes from Singapore and is THAT cheap.... normal price should be about US $25.00 ?
In europe (well everything seems more expensive here the cheapest is about 20 euro!

it sais 100% nokia bat. the one in the picture seems real yeah,
but I guess if you were to order it you might get a clone.

"poor quality battery, but seller quickly issued full refund, so all ok overall." was a feedback...
Not sure but just a first feeling and experience from ordering from foreign countries haha.