We have designed the packaging of the battery to be as safe as possible. All batteries come with a built-in BMS that prevents over voltage charging, over current charging, and under voltage discharging. Additionally, the batteries are packaged in a thick wall steel enclosure for maximum safety and prevention of punctures or damage if dropped. Your safety is of utmost importance, so we advise you only use the included charger or similar manufacturer approved chargers. Discontinue use should the battery shows any signs of damage, such as smoke, bloating, or extremely short run times after a full charge.