You got it, button clearance while screwing in the batt.
It does look big, and you can also tell it's mine by the lean:
The other side is for a magnetically connected atty , 12/10mm diameter:
It looks big in these pics, but the plate section is 4.5mm thick, and my hands aren't that big:
With the 650 mAh size I like the proportion, and with a 900 mAh it will still be good, but the 1000 is about 1mm shorter than the atty. I've got another atty about the same length with a brass mouthpiece and plexi
tank, and another aluminum atty that is about 1mm longer than the 650 mAh batt which can be vaped but it is quite extreme.