Spinners are garbage IMO. I've had 4 go out on me in the past month. Ordered three and one was broken from the get go, so the vendor sent me another one. Before the new one arrived the other two were already pretty much toast (button would work about %30 of the time on one, and the other had to be shaken every 5 minutes to get it to fire). Received the new one and it gets super hot on the bottom when firing sometimes, also has the same connection issue as the previous one. Mind you each of these batteries was shipped directly from Vision.
A lot of people swear by them, but IMO the quality is awful.
EDIT: These are the 1st Spinners that I am talking about, hopefully the Spinner 2 is better!