This is a second rechargeable battery pack, compatible with various Ring devices including Video Doorbell 2, Battery Spotlight Cam, and Battery Stick Up Cam. It keeps your device charged for up to six months, ensuring your Ring devices are always ready to protect your home without the need for hardwiring. When the battery runs low, simply swap it out with this spare Quick Release Battery for uninterrupted power. Recharging is easy: press the tab to release the battery, then connect it to a Charging Station or a power supply using a micro-USB cable. It swaps in and out with a quick-release tab and charges via micro-USB. Depending on usage and weather, it can last for months between charges. Compatible with: Ring Video Doorbell 2, 3, 3 Plus and 4, Ring Battery Video Doorbell, Ring Battery Video Doorbell Plus, Ring Battery Video Doorbell Pro, Ring Door View Cam, Ring Spotlight Cam Battery and Solar, Ring Spotlight Cam Plus, Ring Spotlight Cam Pro, Ring Stick Up Cam Battery, Solar and Plug-In (all generations), Ring Stick Up Cam Pro, Ring Alarm Outdoor Siren, Ring Intercom.