This is strange, even with dead battery the device should work when on charger. If battery is dead it typically dies quickly when you take it off the charger. Did not try with Bangle 1 but that's how it works with other devices. It powers on even with battery completely removed when you attach charger. Are you sure it is actually charging? It can be bad cable or attached in wrong way.
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.
This is strange, even with dead battery the device should work when on charger. If battery is dead it typically dies quickly when you take it off the charger. Did not try with Bangle 1 but that's how it works with other devices. It powers on even with battery completely removed when you attach charger. Are you sure it is actually charging? It can be bad cable or attached in wrong way.