I went the easy route and just replaced the battery without taking out the guts of the unit, and it mostly was very straight-forward using the 1-5 and 46-50 technique.
I ran in to two issues. First, step 47, the ZIF connector for the trackpad cable. I found it much easier to take off the cover and connector on the top of the battery rather than the bottom of the battery. Do what works for you. Second, the two cells in the middle were an absolute bear to get out! And I do wish the instructions were a little more clear on explaining that the frame around them are part of the battery assembly and not of the laptop housing! If they get bent a little, no big deal - they’re coming out anyway!
But most importantly - TEST THE LAPTOP BEFORE FINAL REASSEMBLY! Mine worked just fine, which was great. One thing that does concern me about the iFixit battery: the sticky stuff covers 80%+ of the battery - those things are going to be a bear to replace if I ever need to!!!
Personally I had problems getting the ZIF to disengage, so I disconnected the cable from the other side. Very easy, no problems taking the battery out and dealing with the rest of it.
Thank you! I am typing this on a freshly-restored A1314 that the antenna failed on ages ago. I ended up with a spare keyboard and this one sat disused and forgotten. Then my iMac was stolen last Thanksgiving, complete with keyboard, trackpad, and the MagicWand that bound them together.
Insurance bought me a new 2015 27” iMac, but I absolutely hate the new keyboard and trackpad. I recently came across the spare keyboard, but the sadly cheapass battery had exploded, welding the battery door shut. I followed these instructions, transplanted the circuit board, and resurrected the old keyboard! HAPPY HAPPY, JOY JOY!
For those having problems removing the plastic cover, I couldn’t squeeze one end and get it loose. I ended up squeezing from the long side against the other, and then it came loose easily. That might help you out. And it helps to have a needle nose tweezers, such as comes in iFixit’s tool kit, for dealing with the Philips screw in step 3, also good for dealing with the ribbon cable.