Battery loosing energy quick
In December 24 2018 I bought the Global Version Xiaomi Redmi Note 6 Pro Snapdragon 636 64GB 6.26 inch Notch Full Screen 20MP Front Camera Cellphone
Standard, Black 64GB. Recently I noticed that the battery did not hold the charge as it used to be. I had to charge it twice a day and I do not use the mobile very much. Then I noticed that the back of the phone was coming apart. See photos attached. This phone is not yet three years old and I think normally a phone last a little bit longer.
Can you please tell me what is worng with this mobile? Is it the battery? Please help me to solve this problem. I like my phone and would like to keep it.
Thank you and regards