This is the third battery for this MacBook Pro

Previous replacement was through an "authorized repair center" but after having replaced a battery on a 2016 MacBook Pro, I thought it would be easy to do it on this old laptop.

It went very smoothly and everything is back as it should, and I can use the trackpad.....

I also replaced both fans that were starting to get quite noisy

Very good

My 2015 hard-drive was showing signs of imminent failure (grinding noise) so I ordered a 1TB SSD and carried out the cloning of the original drive. The cloning part took some 13 hours, so I left it unteil next day.

I check that I could boot from the clone installed as an external drive. Everything was OK

Then I did proceed with the replacement, based on this tutorial

I did a fair bit of dusting, including the fans

I did not bother to diconnect the battery.

Replacement went smoothly and as soon as the power was turned on it started (much faster that the hard drive)

Now, I shall consider replacing a fan that is getting noisy and upgrade the OS to the latest available for thet old machine

I did it the "short way" avoiding the lengthy process of removing many small screws, cables an lifting various parts out of the way

I did steps 1 to 5 and then from 46 onwards

The battery cells were so swollen that they sort of participated in easing the process of lifting them out. I hardly needed the adhesive remover

The process of scraping the remains of double sided tape went quite well and the remaining glue came off with some of that adhesive remover

Considering the complexity of disassembly I was putting back that repair, but with some caution, the short way is the way to go!

It took me a couple of hours

Thank you, much better than replacing the full top case!