Pure Evoke 3 battery turns on radio

Hi, 1st time poster, I have a Pure evoke 3 radio, on mains power it works as it should, when on battery fully charged, pressing standby turns off the radio but it immediately comes back on, there is no way of turning it off permanently without plugging in the charger or removing the battery.

Any idea's please?
 
It is in the instruction manual...

Screenshot 2022-10-22 193415.jpg
 
That's an interesting one. I wonder what that component is... it's never easy working off pictures 🙁

Is that part correctly soldered, it looks almost like the solder curves awayd from the lower end of it. Is it a diode or some fusible circuit protector I wonder.