The README.md document specifies the J5 battery connector as "2-pin 1.25 mm JST ZH style male header".
However, JST ZH connectors have a 1.5 mm pitch.
While the J5 male PCB connector does have a 1.25 mm pitch, the "JSP ZH" designation is wrong.
It might be a good idea to update and possibly specify a supplier and part number for a female connector matching J5. I believe the connector is colloquially called "JST 1.25" or "Micro JST 1.25" (Chinese suppliers), although I have not been able to locate the connector in the JST product catalog.
The README.md document specifies the J5 battery connector as "2-pin 1.25 mm JST ZH style male header".
However, JST ZH connectors have a 1.5 mm pitch.
While the J5 male PCB connector does have a 1.25 mm pitch, the "JSP ZH" designation is wrong.
It might be a good idea to update and possibly specify a supplier and part number for a female connector matching J5. I believe the connector is colloquially called "JST 1.25" or "Micro JST 1.25" (Chinese suppliers), although I have not been able to locate the connector in the JST product catalog.