Help! Giant blinking battery digit

[FRED1968]

I'v got a giant Ease-e with a 36V syncdrive front wheel motor. When powering up first the compleet battery symbol is flashing for a few seconds then the fourth digit of the batterysymbol keeps flashing. no faultcode at the left side off the display. The assistance is off.
I'v checkt all connectors, they seems to be OK.
someone any idea's

 

[Nealh]

If it is a closed Giant system not a lot end user can do except do go diagnostics with a Giant dealer.