Bangle.js 2 - Battery always 100%

I've worked around it for now by editing widbatpc.wid.js on the watch, replacing E.getBattery() with a call to a custom getBattery() function:

function getBattery() {
    var battery = Math.round((analogRead(D3) - 0.375) / .00106);
    return battery;
}

That should tide me over until @Gordon returns.