No welding, free disassembly and replacement of batteries. Equipped with DC constant voltage UPS function, it realizes automatic charging and discharging management without the need for manual participation, with multiple output functions, covering commonly used voltages such as 5V, 9V, and 12V in optical tracing, routers, and monitoring cameras. Capacity: Installable battery capacity: 6*3.7V*3400mah=74 watt hours; (battery prepared by user). Output power: rated output power 12Vx5A=60W; the actual output power comes from the output power of the battery itself. Output voltage: output 12V3-5A: 9V1A: USB5V2-3A: Enabling the UPS function requires meeting the input power conditions. Whether the voltage is stabilized: The voltage is not stabilized, the batteries are connected in series and output directly, and the voltage increases or decreases with the power. Application type: Suitable for high-power electrical appliances that do not require voltage stabilization, motors, LED lights, audio, solenoid valves, printers, etc. Battery type: 3.7V cylindrical 18650 battery (power battery recommended) Charger type: Internal charging current limiting circuit, which can be with a 12-13V adapter. When the UPS is used, the greater the input power, the more stable it will be. Charging power: The input adapter power satisfies equal total load power + battery charging power 6 watts Protection circuit parameters: overcharge protection: 4.25V*3; low voltage protection: 2.75V*3; overcurrent detection voltage: 0.1V+-0.025V Operating temperature range:-20℃-60℃ DC interface standard:DC5.5, 2.1mm (positive inside and negative outside) Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Black Material:abs Package Contents: 1 * Charging Cable 1 * Batteries Charger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 18650 Batteries Charger 3.7V 3400mAh Battery Batteries Charger