Hi guys, with so many knock offs and exaggerated capacity batteries floating around, I wanted to share my experiences with an excellent battery manufacturer, Cameron Sino. I have used CameronSino batteries before and to my delight they've exceeded both the run time and life time of the OEM battery. Their BP-4L replacement part number is CS-NK4LSL. So far it has powered my NIT longer than Nokia's BP-4L ever has, at a fraction of the cost of an OEM BP-4L. Upon arrival, I measured the cells voltage. 3.84V. Nice, a fresh battery that hasn't been sitting around for years and discharged, unlike other BP4L 's I've picked up which have arrived around 2.7 volts. The only draw back I experienced was minor. It's terminals were a bit tight and took some wiggling to insert the first time around. This turned out to be a small plus at the end, because the tighter connectors don't allow the battery to wiggle as much inside the N810, like the OEM battery did.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=370312742925

The seller shipped quickly and used the faster air mail post. With all the horror stories, I thought I'd share this diamond in a rough. I have no relationship with the seller or manufacturer. Just sharing my personal experience with an excellent product. It's important to support a company making a legit product at a reasonable price rather than one that slaps a 1500mAh sticker on a 3 year old 800mAh battery, along with a fake Nokia logo.