Milesight - 2 * 9000mAh ER26500 Li-SOCL2 Batteries Battery Life: Standard Mode: Around 10 Years (10 min Interval, 25°C) Bin Mode: Around 10 years (20 min Interval, 25°C) NFC Enabled 2-350 cm Wide Detection Range with Extremely Short Blind Zone Equipped with NTC Temperature Sensor for the Detection and Alarm of Trash Burning NFC Enabled Material: PC + ABS