diff --git a/src/Daqifi.Core.Tests/Device/DeviceCapabilitiesTests.cs b/src/Daqifi.Core.Tests/Device/DeviceCapabilitiesTests.cs
index 9fb21790..87bacb79 100644
--- a/src/Daqifi.Core.Tests/Device/DeviceCapabilitiesTests.cs
+++ b/src/Daqifi.Core.Tests/Device/DeviceCapabilitiesTests.cs
@@ -1,3 +1,4 @@
+using System.Reflection;
 using Daqifi.Core.Device;
 using Xunit;
 
@@ -82,14 +83,16 @@ public void Properties_CanBeSetAndRetrieved()
     }
 
     [Fact]
-    public void Clone_CopiesAllFieldValues()
+    public void Clone_RoundTripsEveryPublicProperty()
     {
-        // Arrange
+        // Arrange: set every public property to a non-default value so a dropped copy is detectable.
+        // Reflection-driven so a newly added property can't be silently omitted from Clone() (#331).
         var capabilities = new DeviceCapabilities
         {
             SupportsStreaming = false,
             HasSdCard = true,
             HasWiFi = true,
+            HasWincWifiModule = true,
             HasUsb = true,
             AnalogInputChannels = 8,
             AnalogOutputChannels = 2,
@@ -100,15 +103,20 @@ public void Clone_CopiesAllFieldValues()
         // Act
         var clone = capabilities.Clone();
 
-        // Assert
-        Assert.Equal(capabilities.SupportsStreaming, clone.SupportsStreaming);
-        Assert.Equal(capabilities.HasSdCard, clone.HasSdCard);
-        Assert.Equal(capabilities.HasWiFi, clone.HasWiFi);
-        Assert.Equal(capabilities.HasUsb, clone.HasUsb);
-        Assert.Equal(capabilities.AnalogInputChannels, clone.AnalogInputChannels);
-        Assert.Equal(capabilities.AnalogOutputChannels, clone.AnalogOutputChannels);
-        Assert.Equal(capabilities.DigitalChannels, clone.DigitalChannels);
-        Assert.Equal(capabilities.MaxSamplingRate, clone.MaxSamplingRate);
+        // Assert: every readable public instance property must round-trip.
+        var properties = typeof(DeviceCapabilities)
+            .GetProperties(BindingFlags.Public | BindingFlags.Instance)
+            .Where(p => p.CanRead);
+
+        foreach (var property in properties)
+        {
+            var original = property.GetValue(capabilities);
+            var copied = property.GetValue(clone);
+
+            // Guard against the test itself leaving a property at its default (which would mask a drop).
+            Assert.NotEqual(property.GetValue(new DeviceCapabilities()), original);
+            Assert.Equal(original, copied);
+        }
     }
 
     [Fact]
diff --git a/src/Daqifi.Core.Tests/Device/DeviceMetadataTests.cs b/src/Daqifi.Core.Tests/Device/DeviceMetadataTests.cs
index eeea416a..058d13f9 100644
--- a/src/Daqifi.Core.Tests/Device/DeviceMetadataTests.cs
+++ b/src/Daqifi.Core.Tests/Device/DeviceMetadataTests.cs
@@ -166,6 +166,115 @@ public void UpdateFromProtobuf_UpdatesChannelCounts()
         Assert.Equal(16, metadata.Capabilities.DigitalChannels);
     }
 
+    [Fact]
+    public void UpdateFromProtobuf_UpdatesHealthTelemetry()
+    {
+        // Arrange
+        var metadata = new DeviceMetadata();
+        var message = new DaqifiOutMessage
+        {
+            BattStatus = 87,
+            TempStatus = 42,
+            PwrStatus = 2,
+            DeviceStatus = 5
+        };
+
+        // Act
+        metadata.UpdateFromProtobuf(message);
+
+        // Assert
+        Assert.Equal(87, metadata.Health.BatteryPercent);
+        Assert.Equal(42, metadata.Health.BoardTemperatureCelsius);
+        Assert.Equal(2u, metadata.Health.PowerStatus);
+        Assert.Equal(5u, metadata.Health.DeviceStatus);
+    }
+
+    [Fact]
+    public void UpdateFromProtobuf_FromSerializedStatusPayload_DecodesHealthTelemetry()
+    {
+        // Arrange: build a status message, serialize it to the wire bytes a device would send,
+        // then decode it back through the protobuf parser — exercising the real frame decode path
+        // (issue #335 asks for a captured/serialized payload, not just an in-memory message).
+        var original = new DaqifiOutMessage
+        {
+            DevicePn = "Nq1",
+            BattStatus = 87,
+            TempStatus = -5,
+            PwrStatus = 2,
+            DeviceStatus = 5
+        };
+        byte[] payload = original.ToByteArray();
+        var decoded = DaqifiOutMessage.Parser.ParseFrom(payload);
+
+        var metadata = new DeviceMetadata();
+
+        // Act
+        metadata.UpdateFromProtobuf(decoded);
+
+        // Assert
+        Assert.Equal(87, metadata.Health.BatteryPercent);
+        Assert.Equal(-5, metadata.Health.BoardTemperatureCelsius);
+        Assert.Equal(2u, metadata.Health.PowerStatus);
+        Assert.Equal(5u, metadata.Health.DeviceStatus);
+    }
+
+    [Theory]
+    [InlineData(101u)]      // above the documented 0-100 range
+    [InlineData(500u)]      // clearly nonsensical
+    [InlineData(uint.MaxValue)] // would wrap to -1 if cast straight to int
+    public void UpdateFromProtobuf_OutOfRangeBattery_IsIgnored(uint battStatus)
+    {
+        // Arrange: a prior valid reading, then a bad one.
+        var metadata = new DeviceMetadata();
+        metadata.UpdateFromProtobuf(new DaqifiOutMessage { BattStatus = 60 });
+
+        // Act
+        metadata.UpdateFromProtobuf(new DaqifiOutMessage { BattStatus = battStatus });
+
+        // Assert: out-of-range battery never surfaces (and never wraps negative); last-known kept.
+        Assert.Equal(60, metadata.Health.BatteryPercent);
+    }
+
+    [Fact]
+    public void Health_SetToNull_IsCoercedToInstance_AndStatusUpdateDoesNotThrow()
+    {
+        // Health has a public setter; a consumer assigning null must not break the status path.
+        var metadata = new DeviceMetadata { Health = null! };
+
+        Assert.NotNull(metadata.Health);
+
+        var exception = Record.Exception(() =>
+            metadata.UpdateFromProtobuf(new DaqifiOutMessage { BattStatus = 42 }));
+
+        Assert.Null(exception);
+        Assert.Equal(42, metadata.Health.BatteryPercent);
+    }
+
+    [Fact]
+    public void UpdateFromProtobuf_NegativeBoardTemperature_IsPreserved()
+    {
+        // TempStatus is a signed field; sub-zero board temperatures must round-trip.
+        var metadata = new DeviceMetadata();
+        var message = new DaqifiOutMessage { TempStatus = -10 };
+
+        metadata.UpdateFromProtobuf(message);
+
+        Assert.Equal(-10, metadata.Health.BoardTemperatureCelsius);
+    }
+
+    [Fact]
+    public void UpdateFromProtobuf_ZeroHealthFields_LeaveLastKnownValues()
+    {
+        // A partial status message (all health fields 0) must not clobber a prior reading.
+        var metadata = new DeviceMetadata();
+        metadata.UpdateFromProtobuf(new DaqifiOutMessage { BattStatus = 90, TempStatus = 30 });
+
+        metadata.UpdateFromProtobuf(new DaqifiOutMessage { AnalogInPortNum = 8 });
+
+        Assert.Equal(90, metadata.Health.BatteryPercent);
+        Assert.Equal(30, metadata.Health.BoardTemperatureCelsius);
+    }
+
     [Fact]
     public void UpdateFromProtobuf_IgnoresEmptyOrZeroValues()
     {
@@ -249,6 +358,13 @@ public void CopyFrom_CopiesAllFieldValues()
                 DigitalChannels = 16,
                 MaxSamplingRate = 5000
             },
+            Health = new DeviceHealth
+            {
+                BatteryPercent = 75,
+                BoardTemperatureCelsius = 33,
+                PowerStatus = 1,
+                DeviceStatus = 4
+            },
             IpAddress = "192.168.1.100",
             MacAddress = "AA-BB-CC-DD-EE-FF",
             Ssid = "TestNetwork",
@@ -285,6 +401,26 @@ public void CopyFrom_CopiesAllFieldValues()
         Assert.Equal(source.Capabilities.HasWiFi, target.Capabilities.HasWiFi);
         Assert.Equal(source.Capabilities.HasUsb, target.Capabilities.HasUsb);
         Assert.Equal(source.Capabilities.SupportsStreaming, target.Capabilities.SupportsStreaming);
+        Assert.Equal(source.Health.BatteryPercent, target.Health.BatteryPercent);
+        Assert.Equal(source.Health.BoardTemperatureCelsius, target.Health.BoardTemperatureCelsius);
+        Assert.Equal(source.Health.PowerStatus, target.Health.PowerStatus);
+        Assert.Equal(source.Health.DeviceStatus, target.Health.DeviceStatus);
+    }
+
+    [Fact]
+    public void CopyFrom_HealthIsDeepCopiedNotShared()
+    {
+        // Arrange
+        var source = new DeviceMetadata { Health = new DeviceHealth { BatteryPercent = 50 } };
+        var target = new DeviceMetadata();
+
+        // Act
+        target.CopyFrom(source);
+        source.Health.BatteryPercent = 10;
+
+        // Assert
+        Assert.NotSame(source.Health, target.Health);
+        Assert.Equal(50, target.Health.BatteryPercent);
     }
 
     [Fact]
diff --git a/src/Daqifi.Core/Device/DeviceCapabilities.cs b/src/Daqifi.Core/Device/DeviceCapabilities.cs
index 7eb94c66..84e54914 100644
--- a/src/Daqifi.Core/Device/DeviceCapabilities.cs
+++ b/src/Daqifi.Core/Device/DeviceCapabilities.cs
@@ -122,6 +122,7 @@ public DeviceCapabilities Clone()
             SupportsStreaming = SupportsStreaming,
             HasSdCard = HasSdCard,
             HasWiFi = HasWiFi,
+            HasWincWifiModule = HasWincWifiModule,
             HasUsb = HasUsb,
             AnalogInputChannels = AnalogInputChannels,
             AnalogOutputChannels = AnalogOutputChannels,
diff --git a/src/Daqifi.Core/Device/DeviceHealth.cs b/src/Daqifi.Core/Device/DeviceHealth.cs
new file mode 100644
index 00000000..15f873ed
--- /dev/null
+++ b/src/Daqifi.Core/Device/DeviceHealth.cs
@@ -0,0 +1,63 @@
+namespace Daqifi.Core.Device;
+
+/// <summary>
+/// Health/telemetry values decoded from a device status message: battery charge,
+/// board temperature, and the raw power/device status codes. These update as new
+/// status messages arrive (including the periodic ones emitted during streaming),
+/// so a snapshot reflects the most recent reading Core has seen.
+/// </summary>
+/// <remarks>
+/// The underlying protobuf fields are proto3 scalars with no explicit presence, so a
+/// value of <c>0</c> is indistinguishable from "not reported". To avoid dropping a known
+/// reading when a partial status frame omits a field, each value is <b>sticky</b>: it holds
+/// the last value the device actually reported until a new in-contract reading replaces it.
+/// <see cref="BatteryPercent"/> and <see cref="BoardTemperatureCelsius"/> are therefore
+/// nullable — <c>null</c> means "never reported since this instance was created" — and the raw
+/// <see cref="PowerStatus"/> and <see cref="DeviceStatus"/> codes default to <c>0</c>.
+/// </remarks>
+public class DeviceHealth
+{
+    /// <summary>
+    /// Gets or sets the battery charge as a percentage (1-100). This is the last in-contract
+    /// reading the device reported (a value may therefore be older than the most recent status
+    /// message, which can omit the field), or <c>null</c> if the device has not reported a valid
+    /// battery level since this instance was created. Out-of-range readings are ignored rather
+    /// than surfaced.
+    /// </summary>
+    public int? BatteryPercent { get; set; }
+
+    /// <summary>
+    /// Gets or sets the board temperature in degrees Celsius. This is the last value the device
+    /// reported (which may be older than the most recent status message, since a frame can omit
+    /// the field), or <c>null</c> if the device has not reported a temperature since this instance
+    /// was created.
+    /// </summary>
+    public int? BoardTemperatureCelsius { get; set; }
+
+    /// <summary>
+    /// Gets or sets the raw power/charging status code as reported by the device
+    /// (<c>PwrStatus</c>). Semantics are firmware-defined; <c>0</c> is the default/unreported value.
+    /// </summary>
+    public uint PowerStatus { get; set; }
+
+    /// <summary>
+    /// Gets or sets the raw device status code as reported by the device
+    /// (<c>DeviceStatus</c>). Semantics are firmware-defined; <c>0</c> is the default/unreported value.
+    /// </summary>
+    public uint DeviceStatus { get; set; }
+
+    /// <summary>
+    /// Creates a deep copy of this <see cref="DeviceHealth"/> instance.
+    /// </summary>
+    /// <returns>A new <see cref="DeviceHealth"/> instance with the same values.</returns>
+    public DeviceHealth Clone()
+    {
+        return new DeviceHealth
+        {
+            BatteryPercent = BatteryPercent,
+            BoardTemperatureCelsius = BoardTemperatureCelsius,
+            PowerStatus = PowerStatus,
+            DeviceStatus = DeviceStatus
+        };
+    }
+}
diff --git a/src/Daqifi.Core/Device/DeviceMetadata.cs b/src/Daqifi.Core/Device/DeviceMetadata.cs
index 790588cd..d01f797a 100644
--- a/src/Daqifi.Core/Device/DeviceMetadata.cs
+++ b/src/Daqifi.Core/Device/DeviceMetadata.cs
@@ -32,10 +32,30 @@ public class DeviceMetadata
     /// </summary>
     public DeviceType DeviceType { get; set; } = DeviceType.Unknown;
 
+    private DeviceCapabilities _capabilities = new();
+    private DeviceHealth _health = new();
+
     /// <summary>
-    /// Gets or sets the device capabilities.
+    /// Gets or sets the device capabilities. Assigning <c>null</c> is coerced to a fresh instance so
+    /// the status-processing path (which populates channel counts here) can never dereference null.
     /// </summary>
-    public DeviceCapabilities Capabilities { get; set; } = new DeviceCapabilities();
+    public DeviceCapabilities Capabilities
+    {
+        get => _capabilities;
+        set => _capabilities = value ?? new DeviceCapabilities();
+    }
+
+    /// <summary>
+    /// Gets or sets the most recent device health telemetry (battery, board temperature,
+    /// power/device status) decoded from a status message. Updated on each status message,
+    /// including the periodic ones emitted during streaming. Assigning <c>null</c> is coerced to a
+    /// fresh instance so <see cref="UpdateFromProtobuf"/> can never dereference null on the status path.
+    /// </summary>
+    public DeviceHealth Health
+    {
+        get => _health;
+        set => _health = value ?? new DeviceHealth();
+    }
 
     /// <summary>
     /// Gets or sets the IP address of the device.
@@ -92,6 +112,7 @@ public void CopyFrom(DeviceMetadata source)
         HardwareRevision = source.HardwareRevision;
         DeviceType = source.DeviceType;
         Capabilities = source.Capabilities?.Clone() ?? new DeviceCapabilities();
+        Health = source.Health?.Clone() ?? new DeviceHealth();
         IpAddress = source.IpAddress;
         MacAddress = source.MacAddress;
         Ssid = source.Ssid;
@@ -187,5 +208,33 @@ public void UpdateFromProtobuf(DaqifiOutMessage message)
         {
             Capabilities.DigitalChannels = (int)message.DigitalPortNum;
         }
+
+        // Update health telemetry. proto3 scalars have no explicit presence, so a value of 0
+        // is indistinguishable from "not reported"; guard on non-zero (consistent with the
+        // other fields above) so a partial status message never clobbers a known reading.
+
+        // BattStatus is a uint documented as a battery percentage. Only accept an in-contract
+        // 1..100 reading: this both filters nonsensical values (>100) and avoids the uint->int
+        // wrap-to-negative a very large value would produce. Out-of-range readings are ignored
+        // (treated as not reported), leaving the last-known value in place.
+        if (message.BattStatus is >= 1 and <= 100)
+        {
+            Health.BatteryPercent = (int)message.BattStatus;
+        }
+
+        if (message.TempStatus != 0)
+        {
+            Health.BoardTemperatureCelsius = message.TempStatus;
+        }
+
+        if (message.PwrStatus != 0)
+        {
+            Health.PowerStatus = message.PwrStatus;
+        }
+
+        if (message.DeviceStatus != 0)
+        {
+            Health.DeviceStatus = message.DeviceStatus;
+        }
     }
 }