I\’ve had the pen for 1yr now and I ain\’t looked back. Love it that I can just whip it out anywhere and take a hit. Took it with me to the Caribbean still performs excellence. if I put a point 9 cartridge in there with a full battery by the time the cartridge is half way I know the battery is about ready to need to get charged. I\’m in a wheelchair I\’ve dropped in many times and she still perform.