Where do you buy your Nokia batteries from?

I thought I’d be a bit of a genius and buy multiple batteries for my Nokia E90. Now and again, I have days where I need to be connected constantly. Maybe there’s a deal going on, maybe there’s a bit of news making a buzz, whatever — sometimes I need to be online continuously when I’m mobile.

The only issue with this is that, as anyone who’s tried making a 10 minute video call knows, mobile handsets are not designed for continuous, always-on transmission. And when you use them in that manner, that’s when you can get really wound up. For example, I’ve been using Nimbuzz, Jaiku, ShoZu and QIK simultaneously. Even the chunky Nokia E90 battery can’t sustain that kind of usage across a day.

Now. My error was going and buying some “genuine” (but, er, probably not) batteries from ebay. They look like Nokia batteries. The seller swears-blind that they ARE genuine. But they’re not. They hold a rubbish amount of charge — sometimes as much as 40 minutes before they start claiming to be empty. Interestingly, although the handset starts to do the low-battery moan, it takes another 40 minutes before the think conks out.

I can’t tell my REAL battery from the other shit ones I bought though.

I checked with the Vodafone shop yesterday — they don’t stock the E90’s BP4L batteries and advised I order directly from the Nokia website. What’s your view? Expansys?