Bangle.drawWidgets hangs app

Looks like the issue is in E.getBattery(). This freezes:

var ctr = 0;
g.clear();
Bangle.setHRMPower(1);
g.setFont("6x8", 3);
setInterval(function(){
  g.drawString(ctr.toString(),60,60,true);
  ctr++;
  E.getBattery();
},1);

Ctrl-C does nothing.

Edit: the call to setGPSPower isn't needed to get the hang.