I try and find all my batteries from
Tenergy LiFePO4 RCR123A 3.0V 750mAh Rechargeable Battery (as low as) $2.79 ea!
since you get them fast after you order.
Dealextreme takes forever. Im still waiting for some and its been a month.
Silver bullet is nice. I like 5 and 6volt best as they replicate a real cig IMO. I cant hardly do 3.7 any more. Not satisfying to me.
Altsmoke.com has batteries also. And some other suppliers. Vaprlife.com
Not sure if puresmoker has the Protege on backorder either.
Jantystick is ok. A lot of people like them. Ive had 2 and switch problems on both several times.
Silver Bullet is nice, Prodigy is very nice too.. But most are on backorder.
Keep on the lookout on forum for when they start taking orders and run for the order button..lol
I use the 6v Chuck as well as some others.. Love it. Seems to be the fastest to ship them out. My suggestion would be the Chuck as you can get in any color almost with graphic if wanted.
I would suggest 510. You cana lways use an adapter from altsmoke for 801s..
My 801's on it work great but dont seem to last long at 6+v.
thagbuilt.com
You can also use 3.7 in the Chuck with different batteries.
You would need 2-RCR123A batteries for 6v and 18650 for 3.7
get 3 sets for 6v and 2 18650 for 3.7 if you go with the regular Chuck.
They will last you a lonnnnnng time..