6500mAh, USB-C doorbell batteryKey Features Long-Lasting Backup Power: 6,500 mAh capacity, up to 6 months of use from a single charge Easy to Install and Remove: Intuitive clasp is designed to be simple and quick to use Charge with USB-C: Power it up with the same cable you use for other devices Official Accessory: Works with eufy Video Doorbell E340 DescriptionSpecifications Features Product type Battery Product colour Black Quantity per pack 1 pc(s) Compatibility E340 Packaging content Quantity per pack 1 pc(s)