Efficient , uninterrupted power supply network Unattended all the year round, connect the wires at one time, never need manual participation, and automatically manage charging and discharging.The lithium battery is with fixed power distribution and constant current charging, which ensures the stable operation of the load and is not affected by battery charging; At the same time, the battery charging is not affected by the dynamic change of load. Adapter power equal battery charging power+load power. Under this condition, the whole circuit is stable, safe and reasonable. It is a virtuous circle. The fake UPS is the interaction between the load and power supply of the charging box, which is a vicious circle. High efficiency = (11.1V-0.3V)/11.1 * 100% = 97.3%; The higher the battery series voltage, the discharge efficiency will be infinitely close to 100%.Ordinary switching power supply is rechargeable, with its own constant current circuit, and no special charger for lithium battery is 0 switching time, seamless switching is an uninterrupted UPS in the . With its own charging status display, it is simple and intuitive Input voltage = equipment working voltage = battery charging voltage = battery full voltage.It is the dream of electronic to fully fill the zero voltage difference of lithium battery with working voltage Good service life and reliability.Safety protection Quadruple protection of overcharge/overdischarge/overcurrent/short circuit Capacity:12V2200mah Overcharge protection detection voltage:4.25V*3 Overcurrent detection voltage:0.1V+-0,025V Detection voltage of low voltage protection:2.75V*3 Colour:Black Material:plastic Package Contents: 1 x Mini UPS Battery Backup 1 cable 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin