Chosen Solution

I have to replace both lcd+touch and battery in iPhone 7, what do toy suggest me ? initially I have to follow steps to replace battery and afterwards I have to replace display ? What is the right sequence?

Start with unplugging the battery connector, then the Lcd. With Lcd removed replace your battery, but plug it into the logic board only at the end, after having put the new lcd in place. This is the correct sequence that will prevent troubles. Enjoy !