Features: The intelligent control chip built in LUZCELL smart charger provides multiple protections by identifying the battery type to prevent the battery from overcharging, overvoltage, overcurrent, and overheat. It is safer and more efficient. The 4 charging slots randomly fit 1 to 4 AA/AAA batteries. It is convenient and fast. The charger case is made of high-quality fire-resistant and heat-resistant plastic of strong impact resistance, safety and durability.