I only found trust-able BV-4D 1400mAh battery from Taobao (the Chinese eBay).

http://item.taobao.com/item.htm?spm=..._u=6v7snk35cfe

Using Google translate if you don't undertand Chinese.

I know there are a lot things are fake in China (maybe inc. the explosive super battery above ), but according to the picture, comment and discription, the battery is genuine.
The Chinese on the back saying that this battery is only for China, Hong Kong and Taiwan market for 808 pureview, hence I'm not expect it appear on ebay UK or US...

There is a problem posting batteries, as DHL and UPS are very strict with battery. I'm trying with ems.

Once the posting method is confirmed I will purchase and share the details.