The battery status has to be decoded on the “Status” register.
Here status is 0004 (hexadecimal). Convert this hexadecimal value to 16 bits binary format.
0004(hexa) = 00000000 00000100 (binary)
The bits 3 and 2 in red are the ones that provide the battery level information :
00 = 100%
01 = 75%
10 = 50%
11 = 25%
Please find more details about the status register in the “Status Registers” sheet of the “Modbus Table” Excel file below: