Waveshare UPS Module B compatible with Raspberry Pi Pico Board, Uninterruptible Power Supply Monitoring Battery Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series boards Incorporates Li-po battery switching charger with dynamic power path management, more stable power supply I2C bus communication, monitoring the battery voltage, current, power, and remaining capacity in real time Multi battery protection circuits: over charge/discharge protection, over current protection, short circuit protection, and reverse protection, more safe and stable.Onboard recharging indicator, power indicator, easy to check the battery status Features At A Glance The Pico-UPS-B is a dedicated UPS (Uninterruptible Power Supply) module designed compatible with Raspberry Pi Pico. It incorporates Li-po battery switching charger with power path management, and voltage/current monitoring chip, allows monitoring the battery operating status via I2C bus. What's more, the male pin header make it possible to "stack" other modules on top. Uninterruptible Power Supply compatible with Pico Keeps Your Pico Running While Recharging, Monitoring Battery Via I2C, Stackable Design Raspberry Pi Pico Header Compatibility Onboard Female Pin Header compatible with Direct Attaching To Raspberry Pi Pico,Male Pin Header compatible with Stacking Other Modules RECHARGE VOLTAGE:5V CONTROL BUS:I2C BATTERY SUPPORT:600mAh 3.7V Li-po battery DIMENSION:62 x 21mm Note Raspberry Pi Pico and Li-ion battery are NOT included. Colour:blue Material:PCB Package Contents: 1 x Pico-UPS-B Board Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.