Ouch! This is a bad battery! Basically, the micro controller within the batteries firmware is messed up.
This is likely a rebuilt battery taking good cells from one battery and adding in the others from a different battery. Then going into the firmware deleting the information it had which was the S/N, date of manufacture and cycle number (which just restarts counting on its own, now at 4)
This is a very cheap battery and won't work reliably as the cells are already used so its a lifespan will be quite short.
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Time to get you money back if you can and get a new battery from a good source [https://www.ifixit.com/Store/Mac/MacBook-Pro-15-Inch-Retina-Mid-2015-Battery/IF117-048?o=5] and do it your self [https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Retina+Display+Mid+2015+Battery+Replacement/89284]
Ouch! This is a bad battery! Basically, the micro controller within the batteries firmware is messed up.
This is likely a rebuilt battery taking good cells from one battery and adding in the others from a different battery. Then going into the firmware deleting the information it had which was the S/N, date of manufacture and cycle number (which just restarts counting on its own, now at 4)
This is a very cheap battery and won't work reliably as the cells are already used so its a lifespan will be quite short.