Lol at people being afraid of batteries.
The voltage difference isn't enough to damage anything.
And the people thinking that you cannot get more size because it isn't the oem don't understand anything about batteries, with them leaving it the nfc, they could easily have more room for the important stuff in a battery.
Fully charge the battery, place a multi meter on the leads of the bat, I'm sure you will find it is the said size.
Batteries are not expensive to produce, and they wouldn't gain anything by lying, esp when word gets around fast about this stuff online nowadays.
On my Sammy fascinate it had a stock battery of 1500 I got an anker that was rated at 1800, it actually measured at 1850, another funny thing was it lasted well longer than the stock, was same dimensions and two batteries, along with a wall charger were only 20 shipped, cheaper and better than oem,
OEM isn't always better, intact oem is often better as they improve designs that the oem overlooks.