The NITECORE NL166 650mAh RCR123A Rechargeable Li-ion Battery is specifically designed for Nitecore flashlights， providing constant and fast power supply. Made with high-grade material and fine workmanship， it is highly reliable and durable for long-term use. This battery is equipped with integrated overcharge and over discharge protection circuits. High-efficiency cores delivers a strong and stable performance. And its 650mAh large capacity ensures long runtime. It is definitely a quality accessory you can count on. Don’t hesitate to get one now!                                    Features            Provide constant and fast power supply for Nitecore flashlightsHighly reliable and durable for long-term useEquipped with integrated overcharge and over discharge protection circuitsHigh-efficiency cores delivers a strong and stable performance650mAh large capacity ensures long runtimeCertified by RoHS，CE and UL                                                            Specifications            Function    Nitecore NL166RCR123A Rechargeable Battery    <br>Input Voltage    3.7V    <br>Capacity    650mAh    <br>Electricity    2.4Wh    <br>Diameter    0.65" (16.6mm)    <br>Length    1.37" (34.8mm)    <br>Weight    0.99oz / 28g    <br>                                                            Package Includes            1 x Nitecore NL166 RCR123A Battery