I just recently bought a used MVP. It's the first one. I wanted to know how long the battery should last. I made it to about 600 puffs on the Puff counter in two days vaping at 5 volts. It charges for about 3 to 4 hours. I also wanted to know some plus and minuses of the device. It seems about right but I wanna make sure I ain't getting shafted. I bought it at a discount from the local vapor shop. I got a warranty with it so I can return it if need b. Can anyone give me a heads up on this battery.