Okay I saw these batteries at cigtechs and I am just in love with them.  I put them in my REO Mini and they worked great stacked...only problem is they don't fit, door won't close, spring is over compressed.  I knew they would be too big, but I noticed some extra space and said...what if. I think they used to fit in a BB (till they changed the diameter). I am in love with 3.0 510 Boge Single coil cartomizers from Good Prophets..they are very inexpensive.  5.99...a 5 pack right now.  I use them at 6v in my Darwin and Provari in my Big Daddy tank, even stuck one on the Monkeyboxx.   But since I noticed these batteries I envision my Lil'mama tank on a very small tube mod, these two batteries inside kicking 6v stacked.  The battery life is impressive.   Anyone know of anyone that has plans for or can make a mod like that.  Really just needs a switch with these 2 batteries stacked! 
  Stacking batteries is the debil, I know, but I have been doing it in my Mag light for years, and I just can't get scared about it. 
Well I finally went to the Mod Database and found that I am looking for a Copper! That was easy!
Ultrafire CE2/15270 3.0v 800 mah Batteries, that 's right 800mah!
	
		
			
		
		
	
			
			
  Stacking batteries is the debil, I know, but I have been doing it in my Mag light for years, and I just can't get scared about it. Well I finally went to the Mod Database and found that I am looking for a Copper! That was easy!
Ultrafire CE2/15270 3.0v 800 mah Batteries, that 's right 800mah!
			
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