Features 1、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. 2、High efficiency boost with load 2W, double cell series balance charger. 3、Battery protection board, lithium battery protection, charging management protection, keep you safe. 4、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 makes charging more efficient and greatly reduces the calorific value. 5、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. 6、Two-color light indicates charging status, red light on when charging, green light on when fully charged. 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