VERY DOUBTFUL that these are genuine or OEM
Highly doubt these are genuine A1618 batteries. I've replaced two now - 1 a year ago and the other a month ago (in different Macs). The year old one is no longer charging and can't be used to run the laptop at all. If I reset the SMC the laptop will start to charge the battery, but then it'll eventually stop charging and run down. The Mac with the month old battery can't run intensive tasks off of the ac adaptor (using the battery) or it randomly shuts down, meaning the battery isn't up to the task of handling peak load, which the original batteries certainly were.
If you need a replacement battery save yourself some money and get a cheaper alternative, as I'm convinced the available batteries for this model Mac are all third-party replacements and no genuine OEM versions exist anymore.
On the most recent battery I received, the text on the cells was printed on a black sticker and not printed directly on the cells like the original, further leading me to believe they're not genuine.
Verified purchase: YesCondition: New