I am looking to buy an aftermarket battery, however I don't know if I can patch the EC without a battery. As written in the readme here:
Additionally, it is mentioned in this video that you need a genuine battery to flash (4:00).The firmware flash process generally requires you to have a charged battery plugged in to the laptop before it will complete. It may be possible to bypass the requirement for a charged battery if you unplug the battery completely. Alternatively, it might be simply looking for any battery /and/ the power charger plugged in. Yes, this is contradictory, but it is worth trying both options.
If anyone has more information, thank you!
Edit: It appears that some comments are mentioning it worked with only AC power cord plugged in. I'd still like to hear other's experiences with this