To disassemble dell g7 7700 laptop, you will need the following tools:
Phillips 1 screwdriver Plastic opening tools
Tweezers
I also recommend using a magnetic mat during the repair process, which is especially useful
in case of Dell G7 7700 laptop. Throughout this disassembly, keep track of each screw so you can
put them back in the right places - this will help successfully reassemble your device. And
don't worry about losing any of screws, all of them will definitely remain on the magnetic mat.
In the description, I left links where to buy all necessary tools.
Turn the laptop over and remove all the screws on the bottom cover.
Use a plastic tool to open the laptop case. I recommend using
a plastic tool so as not to damage the laptop case when opening it.
Disconnect the battery cable from the motherboard.
You can find the replacement battery for Dell G7 7700 laptop using this part number 4K1VM
Also, in the description, I left a link where to buy a new battery for Dell G7 7700 laptop.