diff --git a/apps/sbat/widget-battery.js b/apps/sbat/widget-battery.js
index 060b6d59e..d6f277b50 100644
--- a/apps/sbat/widget-battery.js
+++ b/apps/sbat/widget-battery.js
@@ -13,13 +13,27 @@ function draw() {
     x+=16;
     s-=16;
   }
-  g.setColor(1,1,1);
+  g.setColor(-1);
   g.fillRect(x,y+2,x+s-4,y+21);
   g.clearRect(x+2,y+4,x+s-6,y+19);
   g.fillRect(x+s-3,y+10,x+s,y+14);
   g.setColor(CHARGING).fillRect(x+4,y+6,x+4+E.getBattery()*(s-12)/100,y+17);
-  g.setColor(1,1,1);
+  g.setColor(-1);
 }
 Bangle.on('charging',function(charging) { draw(); g.flip(); if(charging)Bangle.buzz(); });
+var batteryInterval;
+Bangle.on('lcdPower', function(on) {
+  if (on) {
+   draw();
+   // refresh once a minute if LCD on
+   if (!batteryInterval)
+     batteryInterval = setInterval(draw, 60000);
+ } else {
+   if (batteryInterval) {
+     clearInterval(batteryInterval);
+     batteryInterval = undefined;
+   }
+ }
+});
 WIDGETS["battery"]={draw:draw};
 })()