These are rebuilt batteries .  You are buying only one battery.   I have tested each and every battery so you should have no issues. Everything is new, even the Battery Management System.

The three interfaces for charging/discharging and data are exactly the same. Truly plug and play.   These batteries can last 900 plus cycles and I have capacity tested them. I only use high capacity LG or Samsung Cell.   I have a work shop devoted to rebuilding these batteries. I had some new ones but they are all sold.  You will not get any error message on your display you have my word on it. Not plug and pray.

These batteries will not work properly with any any other devices as they are custom made for Segway/Ninebot G30 or Ninebot 30LP

I stress test each battery pack by installing it in my Nineboot Max and riding it at full throttle for 30 minutes on free wheel. So you can be sure you getting an awesome battery. No one on Amazon or Ali Express does that aggressive of testing.

Please be patient as shipping might be delayed as I have to make sure you are getting an awesome battery and at times it is difficult to get quality BMS from China. That is why I have it listed as 10 business days but usually it is a lot sooner. Thank you!!

Email me as I usually have some ready to be shipped.