You really should consider the MVP 2.0 if you are looking to upgrade from your Spinner. It is on sale on a couple of sites and you cannot beat the 2-3 day battery life and the functionality. No need for extra batteries or a charger. It's all self contained in a powerful little package. Some are put off by the box-mod style, but I tell you what, it just freaking works. I have been rebuilding my Protank heads for a while now and just love that I can easily check them on my MPV. I finally have my build just where I want it with GRAND results. Good luck to you!