This was a great tip. I just put the replacement battery in slightly and connected it to the battery connector, then opened the laptop (with the laptop upside down since I didn’t bother putting the bottom cover back on) and plugged in the power cable, then waited for it to load until it showed the battery power level, and then checked that when I disconnected the power cable that the laptop still stayed on using the new battery

I just aimed a hairdryer at the relevant part of the battery for a short while and felt it getting warmer (not the other circuitry), and made sure it was an appropriate distance so it wouldn’t exceed 100 degrees celsius (which is dangerous).

I just poured some “isopropyl alcohol” into a bowl, then cut a piece of plastic (since it bends easily) from some packaging, and then dipped the end of it in the bowl to coat it in the alcohol, then repeated the following process progressively every minute or so: I’d push it under each corner of the battery to apply the alcohol, then wait a while for it to penetrate the glue, and then used a combination of a “plastic card” (i.e. old credit card) the “spludger” tool to slowly lift the battery from the glue.

Important note: I was removing an old battery that wouldn’t hold charge anymore, so I didn’t care about squishing it a bit with the '“spludger” (as long as I didn’t puncture it and cause battery fluid to leak!)

I used “isopropyl alcohol” instead of “acetone” and it dissolved the glue under the battery.

I already had some “isopropyl alcohol” that I bought to make my own hand sanitizer.

If you are replacing an old battery with a new battery, and the trackpad cable goes “under” the battery from the trackpad connector to the other side of it (instead of the trackpad cable going “over” the battery from its trackpad connector as shown in the provided image), then you then it is possible to skip this step. See my comments in Step 17.

If you are replacing an old battery with a new battery, and the trackpad cable goes “under” the battery from the trackpad connector to the other side of it (instead of the trackpad cable going “over” the battery from its trackpad connector as shown in the provided image), then you then it is possible to skip this step. See my comments in Step 17.

If you are replacing an old battery with a new battery, and the trackpad cable goes “under” the battery from the trackpad connector to the other side of it (instead of the trackpad cable going “over” the battery from its trackpad connector as shown in the provided image), then you then it is possible to skip this step. See my comments in Step 17.

If you are replacing an old battery with a new battery, and the trackpad cable goes “under” the battery from the trackpad connector to the other side of it (instead of the trackpad cable going “over” the battery from its trackpad connector as shown in the provided image), then you might instead see a trackpad connector that has a loose tape on it. If the trackpad cable goes “under” the battery then it is possible to skip this step. It is not necessary to pull the tape. Note that I had an A1502 MacBook Pro laptop and was replacing its A1493 battery, it had the trackpad cable going “under” the battery, so I skipped this step and was still able to successfully replace the battery.

If you are only replacing an old battery with a new battery, then this step is not required. See my comments in Step 8.

If you are only replacing an old battery with a new battery, then this step is not required. See my comments in Step 8.