How do I bring a laptop battery back to life…?
You don’t. If you need to recharge the battery the only way to do that is with the adapter but whether the battery will even be able to store a charge is another matter. Oh and putting a laptop battery in the freezer is good for ruining the battery and ruining the battery only. If you just need to get stuff off the laptop then running it off the adapter (which you’re going to need, no matter what) is probably a better way to do things. If you don’t care about whether the laptop will work again you could just get a regulated power supply, set it to whatever voltage the computer has listed as input and then try to plug the power supply into your computer and hope everything works.
