I also have the Spinner 2 and a mPT3/Evod2/Vivi Nova. The Spinner lasts about 8 hours of chain vaping and I use 2 Evod 650 as a back up. The Spinner gets charged overnight and sometimes needs to be disconnected and reconnected within the first few minutes of charging, but is fine thereafter.
Generally, the change to a vv battery has been a revelation and improves the vaping hugely!
Generally, the change to a vv battery has been a revelation and improves the vaping hugely!