EB-BG991ABY Battery For Samsung Galaxy S21 5G G991U1 G991U SM-G991UZAAXAA
NOT Fit Samsung Galaxy S21 Ultra 5G，NOT Fit Galaxy S21 plus 5G. For Samsung Galaxy S21 5G G991B. Remove the old battery, carefully install the new battery on the battery box, tighten the screws, and then connect the wires of the new battery.