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
"i got the item and tested it and it does not seem to work very well and the screen print is way to small to see. i would not suggest this as a good purchase. i gave it as a gift and we spent an hour trying to get it to work. we drank to see if the alcohol level would read and even after 3 drinks it showed no alcohol in the system."