Disappointed

[redeyedancer]

When I had my Mini I compared it to my Grand and the Grand hit a lot harder in my opinion. I guess the 18650 does perform a lot better, all of my batteries are AW IMR. I also have a SSGGTS w/UFS and still my Reo Grand gives me a bigger throat hit but the UFS gives a full flavor indescribable vapor.

I think the only difference your seeing is a 510 to a 901 901s have lots of flavor but lack the throat hit

 

[redeyedancer]

By all mean if anyone is having problems with one of my mods send it in I will make sure its running right.When the mini is running right its putting out some serious vapor

 

[ancient puffer]

I don't know if this has any bearing on the OP, but I remember seeing somewhere that Rob changes out his batteries when they drop to 3.9(?), 3.7(?). I've noticed that I *can* get 3-5 hours before they start to "drop off" dramatically, but if I change them out after about 2 or 3 hours and meter them, they are down to about 3.8 or 3.9v. At that point I get quite an improvement in vapor production and TH from the fresh batteries (4.1 to 4.2v).

I can only figure that their "sweet spot" is 4.2(ish) to 3.8 or 3.9. If the OP is showing only 3.7 to start, then possibly the AW IMR's will make a difference. I've never used anything but the AW IMR's, so can't really compare, but I can say for certain, that the mini performs MUCH better for the first couple of hours with them, then I just switch them out. YMMV