Features: Adopts injection molding housing, polymer eco-friendly materials, firm and stable, fall and pressure resistance, can provides long service time. Quick charging design, 100-240V universal voltage input, suitable for 14.4-18V lithium battery. Charging indicator light, the red light is keeps on under normal the charging conditions. Equipped with temperature protecting function to prevents the battery from heating up and getting hot, effectively protecting the battery and charging safely. During the charging process, the quick charging device monitors actively controls the current, voltage and temperature to optimizes battery life. Adopting high sensitive detection, the battery charging device comes with eight protections inside to prevents overcharging, overvoltage, overcurrent, overpower, overheating, short circuit, with battery protecting and leakage protecting, stable and reliable. Self-carried with USB interface, you can charging your cellphone while charging the battery (USB cable is not included).  Compatible battery model: 18V: BL1815/BL1830/BL1840/BL1845/BL1860 14.4V: BL1415/BL1430/BL1440/BL1445/BL1460