2430mAh 'GOLD' Battery
I've purchased this one off ebay also and can report that it has almost precisely the same life as the original. Which for a battery that claims to offer almost double the capacity of the original is pretty poor. If it was left on standby with virtually no drain on it it would just about outlast the original but i am a heavy user and it drains all that capacity very quickly under use. All of which suggests poor quality.
I've since tried an 'Anker' one of 1600mAh and this is immediately better than the Gold one but with all this fannying about i've actually managed to loose the original so i haven't been able to compare it with the Anker. After the Gold one i imagine the Anker feels better than it actually is and is probably similar to the original!