Dual-Lite approved, Battery Type=Nickel Cadmium, White, 2 AA Type Cells, 600 mA, Output Voltage: 2.4 VDC, Operating Temperature: 0?C to 45?C °C, Terminal Type: 0.1 inch pitch, 2-pole, crimp type terminal. Only batteries approved by Dual-Lite are authorized for use with Dual-Lite products.