Specifications: System: XGT 40V Max Voltage: 40V Battery Type: Li-ion Power Switch: Yes USB Outputs: Number: 2 Voltage: 5V Amperage per port: 2.4 A Total Amperage: 4.8 A Weight without battery: 0.14 kg Dimensions (L x W x H): 96 mm x 76 mm 40 mm Maximum operating temperature: +40 °C Estimated number of times the phone will be charged with a 3000 mAh battery: With 2.0 Ah battery: 2.8 times With 2.5Ah battery: 3.5 times With 4.0 Ah battery: 5.6 times With 5.0Ah battery: 7 times The device works with the MAKITA XGT 40V Max series battery range: BL4020, BL4025, BL4040, BL4050F. The MAKITA XGT 40V Max series batteries are compatible with a range of different MAKITA heavy-duty cordless tools. ** Illustrative photo.