This Rechargeable LED Emergency Bulb is equipped with a built-in 4000mAh high-capacity battery. The battery used in this bulb is the 18650 4000mAh lithium battery, which provides a reliable power source for extended use. With a charging time of 5.5 hours, the battery can be fully charged and ready for use in a relatively short amount of time. If you're looking for a rechargeable light for outdoor activities take a look at our Flashlight Torch,LED Emergency Light,LED Searchlight,LED Headlamp,LED Camping lantern, collections. Additionally, this bulb is designed for easy battery replacement. It has the capability to hold either 3*AAA batteries or 2*18650 lithium batteries. This feature allows for flexibility in power options, providing convenience for users who may prefer using either type of battery. Whether it is for emergency situations or everyday use, this bulb ensures that users can easily replace the batteries as needed, ensu…