Features: brand new and high quality Support simultaneous charging and discharging, uninterrupted power supply. Connecting to an external power supply will supply power to the system and charge the lithium battery at the same for time. If the external power supply is disconnected, it will automatically switch to the lithium battery power supply, which will not affect the normal operation of the system. Spring thimble design, through the spring thimble can supply power to the motherboard, does not occupy pin resources, suitable for pi3/3B+/4B and other motherboards. Real-time detection of the working status of the module can communicate through the 12 C interface to measure parameters such as battery voltage, current, power and remaining power. When the detection voltage is too low, the program can be used to save the data and then shut down to avoid sudden power failure and data loss. Safe and stable circuit design, onboard battery for protection circuit, anti-overcharge, anti-overdischarge, anti-overcurrent, anti-short circuit and anti-reverse connection, balanced charging, stable and safer work. The onboard USB interface can output 5V power supply, which is convenient for supplying power to other main control boards. Large-capacity battery, longer battery life. The onboard warning indicator makes it easy to check whether the battery is connected reversely. Specifications: Material: ABS+Metal Weight: 50g Size: As the picture shows Plug Model: European Standard/for American Standard Package Includes: 1x Power Supply Module Kit(Without Battery) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.