Features: LUZCELL smart rechargeable battery set is a high-quality product with strong power, long-lasting durability, energy saving and environmentally friendly merits. The smart battery, rechargeable for 1000 times, is a 1.5V constant voltage lithium-ion type. Its durability is twice as long as an ordinary Ni-MH battery. The intelligent control chip built in the 4-slot charger provides multiple protections. It is safer and more efficient. The set is certified by UL, CQC, IEC, CE, FCC, UN38.3 and other quality inspections, electromagnetic safety and environment protection.