Methinks the biggest risk is that the knockoffer fritzes up the overcharge protection circuitry in the battery.

I mean, that's Kaboom! time.

That's the biggest singular risk, but not the most common one (based on reports).

thanks for your reply. kind regards!

Yeah, but think about it: If your phone/tablet explodes in your face, are you really going to report about it?

I mean, I know about ouijah boards and stuff, but we're talking about sketchy communications at best...

Good point. I'll ask my magic 8 ball...

right :-))

Well, I threw my chicken bones (gift from Leeroy Jenkins) and they said to stay away from fakie batteries.

Not one person at this site has reported an exploding battery, and I'm sure lots of people have bought non-Nokia batteries here.

Here's the difference between a Nokia and non-Nokia battery, as far as I know. The Nokia ones are probably manufactured in China, and sent to Nokia, which packages them with their products. The non-Nokia ones are probably manufactured in China, and are not packaged by Nokia. I wouldn't be a bit surprised to find that some non-Nokia batteries were produced in the same factory as the Nokia ones. Read up on Chinese manufacturing, it's quite interesting.

The ones I have bought were a zillion times cheaper than Nokia, and for me they have worked great.

I don't know about the tablet batteries but for the phones I used a lot of BL-5C batteries that were very cheap ( 1 or 2 euros, because no one bid on them on ebay ) and fake.
They work ok. they don't explode or overheat or anything, but after a month or two they don't hold charge as well as they should. (about the same as my 14 month old, heavily used nokia battery that I wanted to replace) .
My experience is that the official Nokia batteries last very much longer .

I used two different no-name brands from different sellers, I had the same kind of experience with both.

Right, that's a common experience. Not to say it's 100%, because geneven is correct in what he says, too. Buyers just need to realize they're gambling, and decide for themselves if it's worth it or not.