So I got two and one of them (hulk berry) came perfectly fine, but the other one came with a corroded battery. I didnt want to buy a new one so I ripped open my broken earbud case I bought from the gas station and it took a lot of work to open up the cart but I was able to wedge the bottom open and the battery was inflated twice the size as the other one so obviously it was an old one (probably cheaply made) so I cut the battery wires and checked the button to make sure that it wasnt faulty and i attached the headphone case battery to the wires for the button and light (this is not safe do not attempt, I did this cuz I know how to take safety precautions and it was the same battery type) it worked fine and I can still get high off it but to the average person who is employed this would've been a waste of money and time. I bought this twice before and both times it came through so its kinda a gamble, make sure you get your manufacturer to check each cart for authenticity, thanks bro for reading ts.