In such cases this means that somewhere in the internal memory or in the default folder on the card you have another iGO

You mean no changes with clean packages? Then it remains that only the device is the problem.
Well, make do with iGO8

In general, the title of the topic is inadequate - the problem is not the power of the device, but the original system, launcher and software

Maybe a better unlocker is needed
I read somewhere that software on this device can be switched to 4310 or 8110, working shell script for that models exists.
Edit - no, again - only for iGO8 ...