diff --git a/ProjectObsidian.csproj b/ProjectObsidian.csproj
index e6ed960..9738e67 100644
--- a/ProjectObsidian.csproj
+++ b/ProjectObsidian.csproj
@@ -41,7 +41,7 @@
 		  <HintPath>$(ResonitePath)Resonite_Data/Managed/Elements.Assets.dll</HintPath>
 	  </Reference>
 	  <Reference Include="SteamVR">
-	    <HintPath>Resonite_Data/Managed/SteamVR.dll</HintPath>
+	    <HintPath>$(ResonitePath)/Managed/SteamVR.dll</HintPath>
 	  </Reference>
 	  <Reference Include="System.Net.Http" />  
   </ItemGroup>
diff --git a/ProtoFlux/Hardware/OpenVR/TrackerBatteryBase.cs b/ProtoFlux/Hardware/OpenVR/TrackerBatteryBase.cs
index 5bb0dca..3f5816d 100644
--- a/ProtoFlux/Hardware/OpenVR/TrackerBatteryBase.cs
+++ b/ProtoFlux/Hardware/OpenVR/TrackerBatteryBase.cs
@@ -1,12 +1,46 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using FrooxEngine;
+using FrooxEngine.ProtoFlux;
+using ProtoFlux.Core;
+using ProtoFlux.Runtimes.Execution;
 
-namespace Project-Obsidian.ProtoFlux.Hardware.OpenVR
+namespace Obsidian
 {
-    internal class FileName
-{
-}
+    public abstract class TrackerBatteryBase : VoidNode<FrooxEngineContext>
+    {
+        public ObjectArgument<User> User;
+        public readonly ValueOutput<float> BatteryLevel;
+        public readonly ValueOutput<bool> IsBatteryCharging;
+
+        private ViveTracker _lastTracker;
+        private SyncRef<ValueStream<float>> _batteryLevelStream;
+        private SyncRef<ValueStream<bool>> _batteryChargingStream;
+
+        protected abstract ViveTracker GetViveTracker();
+
+        protected override void ComputeOutputs(FrooxEngineContext context)
+        {
+            User user = 0.ReadObject<User>(context);
+            if (user != null && user.IsRemoved)
+            {
+                user = null;
+            }
+            ViveTracker device = GetViveTracker();
+            if (device != _lastTracker)
+            {
+                _batteryLevelStream.Target = device?.BatteryLevel.GetStream(context.World);
+                _batteryChargingStream.Target = device?.BatteryCharging.GetStream(context.World);
+                _lastTracker = device;
+            }
+
+            BatteryLevel.Write(_batteryLevelStream.Target?.Value ?? -1f, context);
+            IsBatteryCharging.Write(_batteryChargingStream.Target?.Value ?? false, context);
+        }
+
+        public TrackerBatteryBase()
+        {
+            BatteryLevel = new ValueOutput<float>(this);
+            IsBatteryCharging = new ValueOutput<bool>(this);
+        }
+    }
 }