Sodium Battery with Voltage Display

My 8S sodium ion battery now has active balancers and voltage displays.

Heltec display: https://www.aliexpress.com/item/1005006697823220.html

3S/4S Balancer: https://www.aliexpress.com/item/1005005672839228.html ... https://www.youtube.com/watch?v=ohAPRMhZBmU