Yinhing UPS Lithium Battery Expansion Board 4000mAh with Mode Power Supply Overcurrent Ideal for Portable Indoor Use

First Point: Powerful Mode : The UPS Lithium Battery Expansion Board for offers two versatile working modes: outdoor portable power supply and indoor UPS power supply. The outdoor mode utilizes the 4000mAh lithium battery solely, delivering a maximum power output of 5.1V 2.5A for optimal portability.
Second Point: Indoor UPS Functionality: When indoors, simply connect the -USB to a standard 5V 2A power adapter to the power of the UPS functionality. The board intelligently provides a maximum output of 5.1V 3A via the USB-A interface, ensuring your stays powered without interruption.
Third Point: User-Friendly Battery & Power Display: The integrated 4+2 LED indicators keep you informed about charging and discharging status as well as battery power levels. This clear visual feedback allows users to performance and health of the power supply system effortlessly.
Fourth Point: Built-In Features: The UPS expansion board is designed with user in mind, featuring overcurrent and overdischarge . The self-recovery mechanism instantly prevents damage from external short circuits, providing peace of mind during .
Fifth Point: Power Management: The over-discharge kicks in when the lithium battery voltage drops below 2.8V, automatically cutting off the 5V output to the battery. The USB output will automatically when the connected device is removed, promoting longevity and reliability.