Just to add - that first board that got shorted out - you should still be able to use it just fine if you either replace the diode (black component nearest the USB connector), or actually just short it out (in which case you shouldn't plug s battery into the Pico at the same time - but that's the only thing you need to worry about).
... or you can still use the Pico without modifying it at all if you use a battery of separate power supply with it
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.
Just to add - that first board that got shorted out - you should still be able to use it just fine if you either replace the diode (black component nearest the USB connector), or actually just short it out (in which case you shouldn't plug s battery into the Pico at the same time - but that's the only thing you need to worry about).
... or you can still use the Pico without modifying it at all if you use a battery of separate power supply with it