diff --git a/apps/powermanager/ChangeLog b/apps/powermanager/ChangeLog
index d5abdc79b..d660ed56d 100644
--- a/apps/powermanager/ChangeLog
+++ b/apps/powermanager/ChangeLog
@@ -14,3 +14,4 @@
       Log additional timestamp for trace log
 0.11: Minor code improvements
 0.12: Round monotonic percentage, rename to stable percentage/voltage
+0.13: Fix stable percentage not updating
diff --git a/apps/powermanager/boot.js b/apps/powermanager/boot.js
index 64267daa7..898b75cbc 100644
--- a/apps/powermanager/boot.js
+++ b/apps/powermanager/boot.js
@@ -3,7 +3,7 @@
     require('Storage').readJSON("powermanager.default.json", true) || {},
     require('Storage').readJSON("powermanager.json", true) || {}
   );
-  
+
   if (settings.log) {
     let logFile = require('Storage').open("powermanager.log","a");
     let def = require('Storage').readJSON("powermanager.def.json", true) || {};
@@ -12,7 +12,7 @@
     let hw = require('Storage').readJSON("powermanager.hw.json", true) || {};
     if (!hw.start) hw.start = Date.now();
     if (!hw.power) hw.power = {};
-    
+
     const saveEvery = 1000 * 60 * 5;
     const TO_WRAP = ["GPS","Compass","Barometer","HRM","LCD"];
 
@@ -28,9 +28,7 @@
         require('Storage').writeJSON("powermanager.hw.json", hw);
       }
     }
-    
-    
-    
+
     setInterval(save, saveEvery);
 
     E.on("kill", ()=>{
@@ -77,7 +75,6 @@
       })(Bangle[functionName]);
     }
 
-
     let wrapDeferred = ((o,t) => (a) => {
       if (a == eval || typeof a == "string") {
         return o.apply(this, arguments);
@@ -133,25 +130,19 @@
     handleCharging(Bangle.isCharging());
   }
 
-  var savedBatPercent=E.getBattery();
   if (settings.forceMonoPercentage){
-    var newPercent =Math.round((E.getBattery()+E.getBattery()+E.getBattery()+E.getBattery()+E.getBattery()+E.getBattery())/6);
-    
+    var p = Math.round((E.getBattery()+E.getBattery()+E.getBattery()+E.getBattery())/4);
+    var op = E.getBattery;
     E.getBattery = function() {
-
-      if(Bangle.isCharging()){
-        if(newPercent > savedBatPercent)
-          savedBatPercent = newPercent;
-      }else{
-        if(newPercent < savedBatPercent)
-          savedBatPercent = newPercent;
-      }
-      return savedBatPercent;
-  };
+      var current = Math.round((op()+op()+op()+op())/4);
+      if (Bangle.isCharging() && current > p) p = current;
+      if (!Bangle.isCharging() && current < p) p = current;
+      return p;
+    };
   }
   
   if (settings.forceMonoVoltage){
-    var v = (NRF.getBattery()+NRF.getBattery()+NRF.getBattery()+NRF.getBattery()+NRF.getBattery()+NRF.getBattery())/6;
+    var v = (NRF.getBattery()+NRF.getBattery()+NRF.getBattery()+NRF.getBattery())/4;
     var ov = NRF.getBattery;
     NRF.getBattery = function() {
       var current = (ov()+ov()+ov()+ov())/4;
diff --git a/apps/powermanager/metadata.json b/apps/powermanager/metadata.json
index fed7e3bb3..49c77c9d8 100644
--- a/apps/powermanager/metadata.json
+++ b/apps/powermanager/metadata.json
@@ -2,7 +2,7 @@
   "id": "powermanager",
   "name": "Power Manager",
   "shortName": "Power Manager",
-  "version": "0.12",
+  "version": "0.13",
   "description": "Allow configuration of warnings for battery charging, stabilization of voltage, stabilization of battery percentage, and battery logging.",
   "icon": "app.png",
   "type": "bootloader",