With an integrated USB-C charging port, this might be the most convenient, rechargeable camera battery ever made! This ProMaster 1,280 mAh, li-ion, rechargeable battery uses an integrated USB-C port for convenient charging. Just connect to it and wait for the battery's on-board LED light to change from red to green. It's that easy! A USB-C to USB-A charging cord is included for your convenience. Charging will function properly using a USB power source having a minimum charging current of just 0.5A (3.0A max). The battery is compatible with cameras using the Nikon EN-EL25 battery. In addition to its own on-board charging port, the battery also works with in-camera charging as well as external chargers.