Electron Diagnostics w/o battery shows 0 charge

Hello,
I am running my electrons without battery. I have set this in the code:

	PMIC pmic;
        pmic.disableCharging();
	pmic.disableBATFET();
        pmic.disableWatchdog();
	byte DATA = pmic.readChargeTermRegister();
	DATA &= 0b11000110;
	Wire3.beginTransmission(PMIC_ADDRESS);
	Wire3.write(CHARGE_TIMER_CONTROL_REGISTER);
	Wire3.write(DATA);
	Wire3.endTransmission(true);

The device is powered by the “VIN” pin.
Now, when I run diagnostics, I always get a “device unhealthy” because of 0% battery charge.
When I additionally connect the USB Port, I get 100% charge.
Is there a way to report the battery as 100% in diagnostics even when USB is not connected?

Thanks!
arne