Just to add that your Pico might not be totally dead. If you have a breadboard power supply or similar, try connecting it between the 'Bat' and 'GND' pins. The Pico may still be usable like that.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Argh, that's a shame.
Just to add that your Pico might not be totally dead. If you have a breadboard power supply or similar, try connecting it between the 'Bat' and 'GND' pins. The Pico may still be usable like that.