4 Rechargeable Batteries 3.7V 18650 2500 mAh Flat Top (Flat Positive Pole)

Diameter: 18mm Length: 65mm 3.7V rechargeable battery with flat top.
Note: these are flat top batteries and not button top, so please make sure they are right for your use before purchase. Because flat top batteries are sometimes not suitable for use in devices that require button top batteries
2500mAh capacity: With a 2500mAh capacity, this battery offers a substantial charge that can last through prolonged use. The combination of high capacity and high discharge rate provides balanced performance, reducing the need for frequent recharging.
1000 battery cycles: Supports up to 1000 charge and discharge cycles with no memory effect. Reduce the hassle of replacing batteries in your devices
Wide compatibility: The 3.7-volt rechargeable battery has great adaptability, compatible with high-power devices, such as headlamps, flashlights, radios, cameras, doorbells, LED lights, solar lights, toys, small fans, RC cars, headlights, electric vehicles, electronic scales, electronic locks, closed-circuit surveillance, juice cups, balance bikes, entertainment equipment, medical equipment, lighting equipment, power tools, amplifiers, scooters, etc.