I ordered for a sample, the two ordinary 2600 mAh battery's anchor had already. The mAh information is correct not because they are above the specified value of 5200 mAh. So there is no downside for the battery)
For battery life, there is really little to say, because the original battery of Samsung ~ has 2500 mAh and this already has> 5300 mAh in the second charge. Thus, twice the performance compared to the original.
With mobile faq some users have reported this battery. One thing every user was able to confirm: After a short time the battery cover creaks. Had the problem even after 3 weeks and it feels like I have an old remote control in hand.
The S4 doubles the battery, but also the battery performance but you should try it once and then judge yourself. At the beginning I just wanted to use the battery if it was necessary (all day not at home). My opinion has changed, however, very quickly, just brings everything unfortunately nothing because the battery cover creaks. It just annoying and no further order.
Battery cover there is not einzelnd to buy, therefore no further order.