I bought this battery for my Sony NEX-5 camera. The battery is different to the provided picture as the front face is just black no arrow or w logo. On the back of the battery it says 7.2v and 1080 mAh. The battery came charged at 77% , however the instructions said I need to fully charge the battery so I did, I used the charger provided with my sony camera.
I was pleased to see that the battery is fully compatible with my new firmware which is .03, and I can see the remaining battery life on screen (percentage % and battery indicator).
To test the performance of this battery, I started taking one minute full HD videos. The average of this battery is a 35 sec clip for every 1% power, while the original battery can shoot 55sec.
So, I guess this battery dies 1.5 times faster than the original which is not bad considering that the price is 4 times less and hence my 5 stars.
I think this is a good backup battery.