For others using them do you find charging them to be quirky? I use only JoyeTech chargers that are supposedly the best and have always worked well but with the Spinner 2s I find the green light will come on and the light will go off on the battery looking like it is fully charged. Then I can take it off the charger and put it back on and it will charge for sometimes a couple more hours.
It almost seems like the feature that changes the light to indicate the remaining charge in the battery may interrupt the charging process. The Spinner 2s fire button glows white when between 60-100% charged, blue when between 30-60% charged and then orange when 30% or less. When charging the light changes as well to indicate how far along in the charging process the battery is. It seems when the light changes the charger stops and I am having to unscrew then reattach the battery to the charger.
