Hmmm.... and by opening the thing it might be possible to replace the battery when it wears out. If that can indeed be done.Bingo!
Willing to bet the current Aegis Mini already houses an 18650 – but by removing a battery door (or threaded cap) and battery sled, they are able to achieve its smaller form factor.
The original Aegis 100 was designed around a 26650 cell.
@Geekvape_Official – I would keep the Aegis Mini as is to cover that Internal battery device market. Then perform a refresh design on the Aegis 100 watt but base its design around a 21700 cell and not the portly 26650. You should be able to easily achieve a smaller form factor.
I guess we need to wait for them to start wearing out and for someone to take one apart and post a video. It still has that lousy microUSB2 though.