Replacement V4 Battery, 7200mAh Ultra High Capacity Li-ion Replacement Battery for Ring-Doorbell-Camera 2/3/4/3plus, Stick Up Cam Battery (2nd and 3rd Gen), Also for Spotlight Cam and Peephole Cam Battery Our recommendation: If you want to know more details on how to replace the battery, please search for the corresponding battery model on YOUTUBE , where there will be more detailed video steps for reference. Please remember that its full performance and longevity is only achieved after 3 to 5 complete charge and discharge cycles. Do not use low quality third-party adapter charger to charge your device, that will shorten the battery's life. Built-in upgrade smart IC chip technology, and our battery is tested under strict quality control, RoHS & CE & FCC certified. So you can use it with confidence. Usage method: Using up all the power of battery for the first three times before charging, and then take a full charge, thus the battery can be reached the optimum effect of using. Please remember that its full performance and longevity is only achieved after 3 to 5 complete charge and discharge cycles. Inside the package we sent: 1 x battery If you have any dissatisfaction with our products, please feel free to contact us, your satisfaction is our greatest motivation.