DC 12V Output 3x 18650 Batteries Solder-Free Tandem DIY Battery Box Fit for Cellphone WiFi Router LED Light _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Features: 1. Using high quality materials, product quality is guaranteed 2. Compact size, exquisite appearance, simple and convenient disassembly 3. The product comes with two DC5521 interfaces, both can be output or charging 4. The product has a power toggle switch and power indicator, safer to use. 5. The product has a wide range of applications, suitable for small power appliances that do not require voltage regulation, electric motors, LED lights, audio, solenoid valves, radio stations, etc. Parameter: Capacity: Battery capacity: 3*3.7V*3400mah=37 watt-hours; (batteries provided by the user) Output power: rated output power 12V3A = 36 watts; peak power 60 watts Whether voltage stabilization: not stabilized, 3 batteries in series direct output, full 12.6V, low voltage protection 8V, voltage increases or decreases with power Battery type: 3.7V cylindrical 18650 battery Charger type: 12.6V lithium battery charger, through the charger to display the charging status, the battery box no charging display Charging power: 12.6V lithium battery charger 1-2A; 12-25W DC interface standard: DC5.5*2.1MM (inside positive and outside negative) Protection circuit parameters: Overcharge protection: 4.25V*3 Low voltage protection: 2.75V*3 Overcurrent detection voltage: 0.1V+-0.025V Installation Notes: 1, spring to the negative pole, copper to the positive pole, do not install reverse 2, the use of high-quality batteries and require strict pairing Package include: Tandem battery box *1 _x000D_