Features Uninterrupted Power Supply: UPS(uninterrupted power supply), it will charge the battery and no use the battery power, if power failure, it will automatically use the battery power. Two-Color Light Indicates: Battery protection board, lithium battery protection, charging management protection, keep you safe. Two-color light indicates charging status, red light on when charging, green light on when fully charged. 5 in 1 Board: The five-in-one board is a four-in-one heavy upgrade version. Add the balance charging function, the load capacity is enhanced (normally 12 W), and the charging current is increased (1A ), and change the linear charging to switch charging chip, which mak Seamless Switching: The module still has the function of seamless switching between power supply and battery.Power failure or unplugging power does not flash off or restart. Double Cell Series: The high efficiency boost with load 2W, double cell series balance charger. Specification: Conditon: 100% Brand New Item Type: Lithium Battery Step Up Module Material: Synthesis Board Color: As Pictures Shown Power Supply: DC12V/9V Current: 0.9-1A Battery Connection: Double section in series Battery Model: 18650 Lithium Battery(Not Included) Package List: 1 x Lithium Battery Step Up Module Note: The battery is not included. Package List 1 x Lithium Battery Step Up Module