HIKVISION IPC-4300H - 2.3.24. 12 V Power Input Test; The battery charging power and the device’s working power is 12 V. The measured power will change depending on the difference between battery power and backlight brightness.

UM IPC-4300H 040320NA 120
• PSE Transmission:
When PoE/PSE voltage testing, the PoE/PSE must be connected
to the Tester's PSE In port and the camera must be connected to
the Tester's Lan port.
The Tester can transmit data and provide power to the camera at
the same time. A computer connected to the PoE/PSE can also log
into a connected Tester's PoE camera.
2.3.24. 12 V Power Input Test
Connect the 12 V power adaptor to the Tester’s charging port and
click PoE to enter the voltage measurement application. The
screen will show the current adaptor input voltage and power.
The battery charging power and the device’s working
power is 12 V. The measured power will change
depending on the difference between battery power and
backlight brightness.
Figure 120, PoE Voltage and Power Measurement Interface