This Lithium Battery UPS Charging Module is a DC5V 9V 12V step up booster module for 18650 lithium battery UPS voltage converter protection. It has a input voltage of DC5V-12V and output voltage of DC9V or DC12V. The module has a maximum output power of 12W and is designed for use with 1-3AH lithium or polymer batteries. It features reverse connection protection, short circuit protection, and charging indication. The module is suitable for use in a variety of applications, including routers, switches, and infrared alarms.