Features: Standard dimension of Raspberry Pi HAT, and it's for all of the expansion board Cascading design saves space while powering raspberry pi and expansion boards without affecting GPIO expansion Support up to 2A quick-charge technology, can rapidly charge full the battery Can be charged and supplied power to raspberry pi at the same time With 4 LED power indicator Provides an example code to beginner to demonstrate how to demonstrate battery capacity displays the current battery level in the raspberry pi current program, it can detect the current battery, voltage etc. Removable battery, user can choose a more larger capacity lithium battery(NOTE: voltage must be 3.7V) With safety for protection circuit to prevent overcharge and over discharge Retains the raspberry GPIO interface, you still can use all kinds of expansion board Applicatoin scene 1: You can program to control automatic backup of data at low power and safe shutdown. Applicatoin scene 2: Remind users to charge at low battery levels. etc.) Notice: Don'for t connect the micro USB to rasberrry pi; please connect the micro USB to UPS HAT board Specifications: Maximum Output: 5V/2A Maximum Input: 5V/2A Battery Voltage: 3.7V Battery Capacity: 2500mAh Max. Charger Current: 2A Max. Output Current: 2A Board Size: 6.5x5.5cm/2.56x2.17" Battery Size: 6x4cm/2.36x1.57" Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Raspi UPS HAT Board 1 x Li-ion Battery(2500mAh) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.