no one says you can't store them like that. I use mine like nitro all the time. They last so long that the only time you really need to charge them once in a while. you cam mess around in the driveway 5 min here and there with no prep time at all. I can get 20 min out of my Maxamps 6000 with a Novak 6.5 with no problem. I have never let it hit the cut off so I dont really know how long it will last.