diff --git a/apps/widminbat/widget.js b/apps/widminbat/widget.js
index 087fb1510..9c088bf06 100644
--- a/apps/widminbat/widget.js
+++ b/apps/widminbat/widget.js
@@ -1,4 +1,4 @@
-(function(){
+(()=>{
   function getWidth() {
     return E.getBattery() <= 30 ? 40 : 0;
   }
@@ -8,20 +8,22 @@
     var bat = E.getBattery();
     var x = this.x, y = this.y;
     g.reset();
+    g.clearRect(x,y,x+s,y+24);
     g.setColor(g.theme.fg).fillRect(x,y+2,x+s-4,y+21).clearRect(x+2,y+4,x+s-6,y+19).fillRect(x+s-3,y+10,x+s,y+14);
     var barWidth = bat*(s-12)/100;
     var color = bat < 15 ? "#f00" : "#f80";
     g.setColor(color).fillRect(x+4,y+6,x+4+barWidth,y+17);
-  },updateWidth: function() {
+  },update: function() {
     var newWidth = getWidth();
     if(newWidth != this.width) {
       this.width = newWidth;
-      Bangle.drawWidgets();
+      Bangle.drawWidgets();//relayout
+    }else{
+      this.draw();
     }
   }};
   setInterval(()=>{
     var widget = WIDGETS.minbat;
-    if(widget) {widget.updateWidth();}
+    if(widget) {widget.update();}
   }, 10*60*1000);
 })();
-