M7440 without battery

Miler what is the M7440?? Can you explain in more detail what it is ?

There is one scheme when this may be possible (the result is not guaranteed). You open the lid, take out the battery, put the open lid up, the usb connector to yourself. In this position, the contacts go like this: TCP+ TCP-. Between NTSC and P-you put a resistor of ~ 70 kOhm. Between TH and P-we put a resistor of ~ 10 kOhm. Plug in the USB wire, click and hold the button, the router turns on and works. The battery is on the menu with a full charge. Works without battery from charging your phone. This is described in even more detail at https://batterytools.net/ (actually where I got the scheme from). If you have any questions, ask me or in this article.