I bought 2 of them to use in a mechanical mod with a resistance of 0.40 A because they have a discharge current of 20A. The first two months everything was fine, but then they started acting up (I pressed the button on the mod and they didn't deliver power, I measured them with an XTAR VC4S charger and a multimeter and they had a remaining capacity of 3.70 A, which means that something was not right with them while the mod was working fine with Efest 3000mAh 35A, which deliver power up to 3.40 A and beyond that they are weak.
I don't know if it happened only to me, but playing with them in a mechanical mod is risky, that's how I see it, so stay away, and one last thing, their capacity only reaches 2500 Mah when charging