The rating on that battery is fake, as I said there is no such thing as a battery of that size with that capacity. Most batteries with this sort of fake rating are actually very weak and have no protection. You need a real, reputable battery rated for 10A+ continuous output. The rating for an 18650 should be 3150 to 3500mah. The highest rating from a real battery that exists is 3600. The capacity is only part of it though, as the current rating and protection circuit need to be able to deliver the current to the pixels.