I switched from a DSE810 to a 510 eGo, and bought 510 to 810 and 810 to 510
adapters with my new eGo kit. I've tried my 810 atty on a eGo battery, and
my new 510 atty on my 810 pass-thru and it's GREAT!!!!
I can use my old equipment interchangable with my new, and both
work flawlessly. The 810 cart holds more juice and is killer with an
eGo battery. The 510 cart has better flavor (or so it seems to me) and
my pass-thru is still usable. Lowered the cost somewhat in upgrading
to an eGo as I didn't lose all my original equipment investment.