I just installed the eBay battery
from seller omg_1971. I've noticed some strange anomolies that confirm that it is likely not genuine, despite the fact that it seems to be a good quality fake (at least as aesthetically, can't speak to function quite yet).
First, if you go back and look at the coconut battery screenshots for the eBay batteries in this entire thread, they all have the
exact same serial number D861015004NDGDL3T. In my case, the sticker on my battery does not match this number either (see pics). The NuPower and other batteries seem to have unique numbers, so this is suspicious to say the least.
Second, I had the strange situation where my loadcycle count randomly reset itself from 4 to 2. I'm still waiting to see what happens next with that.
Lastly, I've had a couple of sudden shutdowns at around 66/67% (the percentage it arrived at when new, coincidence?). After that, if I turn the computer back on again, it seems to continue functioning and discharging at a normal rate (and not shutting down again until empty).
I've communicated with the seller about all these things. I'm still in the battery conditioning and calibration stage (trying to full charge and run it down for a full 5 cycles per the sellers instructions after contacting through eBay). I've done one SMC reset. Will try NVRAM also. I also opened it back up tonight to make sure everything was seated correctly. Will continue monitoring and report back whether or not I end up returning this for refund or exchange.