It is not the fault of the batteries or cables. The fault is on the Sigma side, because it can't read information about the bully, the console also has "FAILED" is it possible to turn off reading information about the software version?
Sigma is the fault - it cannot read the software bulid, which is why it throws an error example in the adb console, test if you also have such an error in the console
Code:
fastboot oem get-build-number
It seems that the error occurs when loading the software that is in the phone. Support can you remove the software version and test it?
SigmaKey 2.36.00 HiSi: Get device info
SN: HVY0218804001xxx
IMEI1: 8693280300xxxxx
IMEI2: 8693280300xxxxx
MEID: 00000000000000
Bootloader unlocked: NO
FB unlocked: NO
Battery voltage: -
Phone model: SNE
Build number: Unexpected response from the phone
I think Sigma detects an error and stops working I tested on the adb console - "Failed (unknow status code)"
xpictures