I just replaced my MacBook Air Battery here. Some notes:
Reset the SMC after replacement (did nvram as well just for voodoo)
Calibrate the battery by charging it up to 100% +2hrs, then letting it drain (used a live stream for 5 hours…), then charging back up again
Checked with Coconut Battery and it comes up as:
* Manufactured by simplo
* 58 days old
* Capacity is correct (7109)
* Load cycles 2 - that’s me calibrating the battery as above
The vendor here in Aus was an eBay seller: [https://rover.ebay.com/rover/0/e11401.m1842.l44715/7?euid=a97827bf6acb4b7895a9bd11f9ae7cb5&bu=43165784146&loc=https%3A%2F%2Fwww.ebay.com.au%2Fulk%2Fusr%2Fturbodeals007&sojTags=bu=bu|turbodeals007] who also provided the screwdrivers required