Have you ever experienced interrupted play caused by a dead battery when you are away from home or travelling? Here we are pleased to recommend you this 3.7V 3600mAh UltraFire 18650 Li-ion Rechargeable Battery Blue. Use the battery to keep your electronic device powered up when away from home or travelling. Through rigorous test for voltage， capacity， compatibility and safety， you can feel free to use this 18650 battery. Ensure your device always have plenty of power with this durable and reliable 18650 battery. Don′t hesitate to bring such an excellent battery home! <br>                                    Features            New batteryHigh quality and durableProvides excellent continuous power sources to your deviceHigh energy density， long life batteryThis battery has an extra long life for all your battery powered devices                                                            Specifications            Battery Type    18650 battery    <br>Voltage    3.7v    <br>Capacity    3600mAh    <br>Charge Time    about 6~8hours    <br>Rechargeable Times    about 500~800    <br>Material    Li - ion Battery    <br>Weight    2.86oz / 81g / Pcs    <br>Dimensions    6.5 x 1.7 cm / 2.56" x 0.67" (L x Dia) / Pcs    <br>                                                            Package Includes            4 x 3.7V 3600mAh UltraFire 18650 Li - ion Rechargeable Battery Blue