Cannabis disposables are designed to provide usually a few hundred puffs and are typically a half gram (500mg). Battery life is important when choosing a THC pen so that your disposable doesn’t die on you before the oil runs out. TribeTokes disposable dab pen batteries last over a year, and if it dies before then, we would replace it for you. If your disposable vape pen is not working, please email us at team@tribetokes.com!