one of the best Protected Batteries

According to this test table [...]
one of the best battery of a large list of candidates test, even at high current load.
So he keeps the promise 3400 mAh a really!

A burn time test in my Spark SD6 I have not done, but he holds an eternity even at full brightness and occasionally Turbo mode. When one says: "for several hours at full brightness" it would certainly not lying.

The protection circuit is working properly and turn off the battery when reaching the minimum voltage.
And respect, not scare: the battery then has on the meter for several minutes 0 volts and can not even load. But that's normal, because after a few minutes, the protection circuit shuts down again, he has re-voltage and you can charge it again.
So this is a sign that the protection circuit is functioning properly - the battery can actually remain in the lamp until the light goes out, and he will not be damaged.

I invite him to a Xtar WP2 charger so that he has after charging with 1A charging current exactly 4.20V - perfect!

If he holds still long (I hope times) then I am extremely pleased with this battery, and it is well worth the money.