I don’t know why anyone would want to bring out fake Boruit batteries, they aren’t very well known. But the “4000mAh” was a dead giveaway on these batteries. Here are genuine 2200mAh protected Boruit and the fake 4000mAh:
Actual capacity of the 2200mAh = 2296mAh
Actual capacity of the 4000mAh = 1057mAh