Well, include me into the club of burnt cartomizer users. Wasted some juice (KBV OMG) but there was something that bothered me about the filler. So, here's a pic of a dual coil I took apart out of curiosity:
The filler was ok but it was the 2 little pieces (don't know the name for them) that was wrapped around the coils that were burnt. As you can clearly see in the pic.
Hey all! Washvap - mine was real close to what you have their with the burnt - diapers/wraps/ ... fill in the blank

What I did afterward was to soak all in the Galen's 151 proof vodka and the filler came out fairly white whereas the diaper was clearly burnt - blacker than what I see here - tiny hole....
I used it mainly on a SE Riva but had it on a Reo mod at one point - both 3.7v true.
BTW, OT - I've lost about 7 eGo-t attys since Scottbee and I got our first ones in December. I half/noticed (not paying enough attention) that the first few went upon first connecting to a new batt. Then 'which batt' became more evident - I have two regular Rivas - gold bands and several SE Rivas - silver band and one of the 'gold bands' was the culprit in the last three attys that I lost and I suspect at least 2 of the earlier ones from this same event - batt right off charger - atty gone. I know one went on a regular eGo batt - I don't believe I've lost any on the SE Rivas (odd since the increased voltage underload) AND these are regular ohm'd eGo attys.
I have lost LR's on each type of batt but for the most part they last longer than regular 510 lr attys (except for ciscos - real workhorses) So... I so wish Scottbee was around and I'd send him the one gold band to check it out internally - it still works, charges fine but I suspect it has a spike in V coming off the charger.... just in case anyone else is having the same effect and is wondering - take the batt off line....
And again OT here but I've had three cisco attys in my Reo mini since December - actually the first one was on a mega batt and then went to the Reo - that lasted three months, the next one almost three months, and the last one going strong since the last one went. It's the only atty that really lights up BWB applewood for me.