I haven't seen CE2s with low resistance or I probably would have.
The only thing I don't like about the ones I've tried is the double looped "yarn" that serves as the wick. After not too long the yarn/wick gets burnt and builds up with hardened
juice and won't suck up the
juice very well so you have to trash it.
I *guess* these are indeed Boges - though I found no text or markings on the connector as one responder intimated. The connector is silver colored, not gold irridited. I measured the resistance on 4 of them. Only one was 2.1ohms, the other three were 2.2, 2.3 and 2.4. Better than the standard m-series which are usually around 2.8 to 3.2ohms, though. M-series atties seem to work best if you can pull at least an amp through the coils. The m batteries are 2.8V fully charged which gives you 1A (1000mA) with a 2.8 ohm atty but less as the charge depletes and the voltage drops.
So... The first carto crapped out after 5-6 refills. Got really hard to draw through. I've seen this on old kr8 cartos. The fabric cylinder going down the middle gets misaligned and covers the hole. I'm guessing it can be either from inadvertently shoving it with tweezers when pulling the cap to refill or also when the nylon tube thingie starts to get burnt, it shrinks just like when you burn the end of a nylon rope. This tends to pull the wire for the coil down and over to one side - the side the coil is on and the burn is. Possibly I snagged it once with my tweezers, though.
Anyhow, so I fired up a second one.......literally. No kiddin', I filled it with a good amount of juice, started to drag and it smoked - not vapor! - like crazy even after the atty shut off and I smelled nylon. Used it for awhile anyway but it worked really wimpily (is that a word? is now, I reckon! lol) so I bagged that one. The 3rd one works like a charm (2 days) as the first one did b4 it got plugged. I sorta modded this 3rd one in that I took one of those thick, flat rubber washers (flat on one side, cupped on the other) that came out of some old cartos I saved parts from and inserted it, cupped side down, over the top of the packing so that the nylon webbed tube is lined up straight. I'm hoping that this will serve to keep the nylon web cylinder aligned and prevent the problem I had with the first carto. If these are Boges, I was surprised to find that there was no rubber washer under the soft plastic end cap like I've seen on some other cartos (old kr808-D2 "Green Smoke" and, also, Litecig has 'em). Not too big a deal but still an unexpected omission.
Not too bad other than the "booby-trapped" one - lol. Definitely, the lower resistance does wonders for TH and vapor when using an m-401 batt and with the 501 (3.1V to 3.4V, I expect - haven't thought to measure yet) it's outta sight!
Lots more pages than when I last looked - now to read them....
C-ya,
Rick