I went for a lunch-time walk with the intention to look out for a discarded 'disposable' e-cigarette. I found by the side of the road almost immediately.
This was quite a big one, and looking on the Internet sells for about £10 ($12). Far from being a flimsy thing, the case was well made and looked like it was designed to be taken apart. One end was held in place by push clips that opened easily with a screwdriver.
So what did I find! Well, a lot less than I was expecting! There are just 3 electronic components:
- The battery - 5.18Wh cylindrical LiPo. This was still measuring 3.4V
- The heating element - showing a cold resistance of 1Ω
- What looked like an electret mic insert, but I believe from the wiring, detects the cigarette being sucked, and switches power from the battery to the coil