Features Standard dimension of Raspberry Pi HAT and its compatible with 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 picurrent program it can detect the current battery voltage etc 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 Removable battery user can choose a more larger capacity lithium battery pack NOTE voltage must be 3 7V With safety protection circuit to prevent overcharge and over discharge Retains the raspberry GPIO interface you still can use all kinds of expansion board It is Mini UPS power supply maximum 5V 2A output and maximum 5V 2A input Click to know more information Note The battery is not included Package included 1 x UPS HAT Board