This product is UltraFire AX18650 li-ion battery with great capacity and without memory effect. Compared with other on-off battery, it can recharge for many times and is contribute to protect enviroment. Rechargeable battery with PCB and its life is around 10 years.Features: * 100% brand new and high quality * Li-ion battery * Rechargeable battery with PCB * Environmental friendly * Capacity:3800 mAh * Voltage:3.7V * Color:Gray * Length:6.5cm * Diameter:1.8cm Package included: 2* Li-ion batteries 53573
"Just received this item, I can't wait to start using it. I've even showed this to others I work with, encouraging them to purchase one (or more) for themselves. Thanks again for such a well designed, well manufactured, and economical, useful product."