[High Quality Reliable Battery] Diameter: 18.8mm, Length: 66mm. Powo 18B battery is tested by professional testers under strict quality control standards. Get CE, UL certification. Totally against overheating and leakage, so you can charge and use safely. Product Patent Number: 015037694-0001
[Extra Large Capacity & Great Performance] - Powo 18B battery has 3000mAh effective, supports stable output voltage of 3.7 volts, makes devices more stable and lasts longer, excellent replacement batteries for frequently used devices. A fully charged battery can power the flashlight or headlamp for 2-4 hours/doorbell for 3-6 months/ small fan for 3-4 hours.
[Multi-use & Over 1000 Cycles] - No memory effect. Can be charged more than 1000 times. Perfect for flashlight, camera, drone, head lamp, RC car, etc.
[Battery Case for Easy Carry] - Each pack comes with 4 batteries and 1 compact battery case (3" x 2.7" x 0.78"). You can easily put it in your bag as spare batteries.
[Package Included] - 3000mAh Rechargeable Battery x 4, Battery Compartment x 1, Battery Protective Case x 1. Note: The battery requires a charger (not included) to charge.