FeaturesTwo Working Modes: The raspberry pi 4 ups divided into outdoor portable power supply and indoor UPS power supply. This product can meet your different needs and bring a better usage experience.Fine Details: As outdoor portable power supply, the motherboard is only powered by lithium battery. The maximum external power supply capacity is 5.1V 2.5A. As indoor UPS power supply: insert MicroUSB into ordinary 5V 2A Power adapter, and the external output USBA interface can output a maximum of 5.1V 3A.Battery Power Display: 4+2LED for charging and discharging, and battery power display. This design is more convenient to know the charging status.Protection Function: The motherboard integrates overcurrent and overdischarge protection. Also, the external output port has a selfrecovery fuse to prevent the for Raspberry Pi from being burnt due to an external short circuit.PMU Overdischarge Protection: When the lithium battery voltage is lower than 2.8V, the PMU judges that the battery has been overdischarged and automatically cuts off the 5V output. When the total current of 2 USB output ports reaches 3A, the selfrecovery fuse will be fusing. When the external port is no load, the 5V output will automatically restore.Features:1.Two working modes: divided into outdoor portable power supply and indoor UPS power supply.2.As outdoor portable power supply, the motherboard is only powered by lithium battery. The maximum external power supply capacity is 5.1V 2.5A.3.As indoor UPS power supply: insert MicroUSB into ordinary 5V 2A Power adapter, and the external output USBA interface can output a maximum of 5.1V 3A.4.4+2LED for charging and discharging, and battery power display.5.The motherboard integrates overcurrent and overdischarge protection.6.The external output port has a selfrecovery fuse to prevent the forRaspberry Pi from being burnt due to an external short circuit.7.When the total current of 2 USB output ports reaches 3A, the selfrecovery fuse will be fusing. When the external port is no load, the 5V output will automatically restore.Specification:Condition: brand newBattery: 1 x 3.7V 4000mAh lithiium batteryPackage Weight: Approx. 122g/4.3ozPackage list:1 x Lithium Battery Expansion Board1 x Lithium Battery1 x Set of Installation AccessoriesNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.Package List