diff --git a/apps/widbattpwr/ChangeLog b/apps/widbattpwr/ChangeLog
index b1bdaa6fc..be3698e53 100644
--- a/apps/widbattpwr/ChangeLog
+++ b/apps/widbattpwr/ChangeLog
@@ -1 +1,2 @@
 0.01: Initial fork from hwid_a_battery_widget
+0.02: Use `power_usage` module
diff --git a/apps/widbattpwr/metadata.json b/apps/widbattpwr/metadata.json
index 667485666..f802a21f5 100644
--- a/apps/widbattpwr/metadata.json
+++ b/apps/widbattpwr/metadata.json
@@ -3,7 +3,7 @@
   "name": "Battery power and percentage widget",
   "shortName": "Batt Pwr",
   "icon": "widget.png",
-  "version": "0.01",
+  "version": "0.02",
   "type": "widget",
   "supports": ["BANGLEJS2"],
   "readme": "README.md",
diff --git a/apps/widbattpwr/widget.js b/apps/widbattpwr/widget.js
index 58f89dc34..16b444208 100644
--- a/apps/widbattpwr/widget.js
+++ b/apps/widbattpwr/widget.js
@@ -20,13 +20,7 @@
     function draw() {
         var x = this.x;
         var y = this.y;
-        var batt = E.getBattery();
-        var pwr = E.getPowerUsage();
-        var usage = 0;
-        for (var key in pwr.device) {
-            if (!/^(LCD|LED)/.test(key))
-                usage += pwr.device[key];
-        }
+        var _a = require("power_usage").get(), usage = _a.usage, hrsLeft = _a.hrsLeft, batt = _a.batt;
         var pwrColour = powerColour(usage);
         g.reset()
             .setBgColor(g.theme.bg)
@@ -43,9 +37,8 @@
                 txt = "".concat(batt, "%");
             }
             else {
-                var hrs = 175000 * batt / (100 * usage);
-                var days = hrs / 24;
-                txt = days >= 1 ? "".concat(Math.round(Math.min(days, 99)), "d") : "".concat(Math.round(hrs), "h");
+                var days = hrsLeft / 24;
+                txt = days >= 1 ? "".concat(Math.round(Math.min(days, 99)), "d") : "".concat(Math.round(hrsLeft), "h");
             }
             var txth = 14;
             g.setColor(g.theme.fg);
diff --git a/apps/widbattpwr/widget.ts b/apps/widbattpwr/widget.ts
index de5352f32..5a2de84a9 100644
--- a/apps/widbattpwr/widget.ts
+++ b/apps/widbattpwr/widget.ts
@@ -22,13 +22,7 @@
 		let x = this.x!;
 		let y = this.y!;
 
-		const batt = E.getBattery();
-		const pwr = E.getPowerUsage();
-		let usage = 0;
-		for(const key in pwr.device){
-			if(!/^(LCD|LED)/.test(key))
-				usage += pwr.device[key];
-		}
+		const { usage, hrsLeft, batt } = require("power_usage").get();
 		const pwrColour = powerColour(usage);
 
 		g.reset()
@@ -47,10 +41,8 @@
 			if(showPct){
 				txt = `${batt}%`;
 			}else{
-				// 175mAh, scaled based on battery (batt/100), scaled down based on usage
-				const hrs = 175000 * batt / (100 * usage);
-				const days = hrs / 24;
-				txt = days >= 1 ? `${Math.round(Math.min(days, 99))}d` : `${Math.round(hrs)}h`;
+				const days = hrsLeft / 24;
+				txt = days >= 1 ? `${Math.round(Math.min(days, 99))}d` : `${Math.round(hrsLeft)}h`;
 			}
 
 			// draw time remaining, then shade it based on batt %