diff --git a/include/batteryservice/BatteryService.h b/include/batteryservice/BatteryService.h
new file mode 100644
index 0000000..855262b
--- /dev/null
+++ b/include/batteryservice/BatteryService.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_BATTERYSERVICE_H
+#define ANDROID_BATTERYSERVICE_H
+
+#include <binder/Parcel.h>
+#include <utils/Errors.h>
+#include <utils/String8.h>
+
+namespace android {
+
+// must be kept in sync with definitions in BatteryManager.java
+enum {
+    BATTERY_STATUS_UNKNOWN = 1, // equals BatteryManager.BATTERY_STATUS_UNKNOWN constant
+    BATTERY_STATUS_CHARGING = 2, // equals BatteryManager.BATTERY_STATUS_CHARGING constant
+    BATTERY_STATUS_DISCHARGING = 3, // equals BatteryManager.BATTERY_STATUS_DISCHARGING constant
+    BATTERY_STATUS_NOT_CHARGING = 4, // equals BatteryManager.BATTERY_STATUS_NOT_CHARGING constant
+    BATTERY_STATUS_FULL = 5, // equals BatteryManager.BATTERY_STATUS_FULL constant
+};
+
+// must be kept in sync with definitions in BatteryManager.java
+enum {
+    BATTERY_HEALTH_UNKNOWN = 1, // equals BatteryManager.BATTERY_HEALTH_UNKNOWN constant
+    BATTERY_HEALTH_GOOD = 2, // equals BatteryManager.BATTERY_HEALTH_GOOD constant
+    BATTERY_HEALTH_OVERHEAT = 3, // equals BatteryManager.BATTERY_HEALTH_OVERHEAT constant
+    BATTERY_HEALTH_DEAD = 4, // equals BatteryManager.BATTERY_HEALTH_DEAD constant
+    BATTERY_HEALTH_OVER_VOLTAGE = 5, // equals BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE constant
+    BATTERY_HEALTH_UNSPECIFIED_FAILURE = 6, // equals BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE constant
+    BATTERY_HEALTH_COLD = 7, // equals BatteryManager.BATTERY_HEALTH_COLD constant
+};
+
+struct BatteryProperties {
+    bool chargerAcOnline;
+    bool chargerUsbOnline;
+    bool chargerWirelessOnline;
+    int batteryStatus;
+    int batteryHealth;
+    bool batteryPresent;
+    int batteryLevel;
+    int batteryVoltage;
+    int batteryTemperature;
+    String8 batteryTechnology;
+
+    status_t writeToParcel(Parcel* parcel) const;
+    status_t readFromParcel(Parcel* parcel);
+};
+
+}; // namespace android
+
+#endif // ANDROID_BATTERYSERVICE_H
diff --git a/include/batteryservice/IBatteryPropertiesListener.h b/include/batteryservice/IBatteryPropertiesListener.h
new file mode 100644
index 0000000..b02d8e9
--- /dev/null
+++ b/include/batteryservice/IBatteryPropertiesListener.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_IBATTERYPROPERTIESLISTENER_H
+#define ANDROID_IBATTERYPROPERTIESLISTENER_H
+
+#include <binder/IBinder.h>
+#include <binder/IInterface.h>
+
+#include <batteryservice/BatteryService.h>
+
+namespace android {
+
+// must be kept in sync with interface defined in IBatteryPropertiesListener.aidl
+enum {
+        TRANSACT_BATTERYPROPERTIESCHANGED = IBinder::FIRST_CALL_TRANSACTION,
+};
+
+// ----------------------------------------------------------------------------
+
+class IBatteryPropertiesListener : public IInterface {
+public:
+    DECLARE_META_INTERFACE(BatteryPropertiesListener);
+
+    virtual void batteryPropertiesChanged(struct BatteryProperties props) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_IBATTERYPROPERTIESLISTENER_H
diff --git a/include/batteryservice/IBatteryPropertiesRegistrar.h b/include/batteryservice/IBatteryPropertiesRegistrar.h
new file mode 100644
index 0000000..8d28b1d
--- /dev/null
+++ b/include/batteryservice/IBatteryPropertiesRegistrar.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_IBATTERYPROPERTIESREGISTRAR_H
+#define ANDROID_IBATTERYPROPERTIESREGISTRAR_H
+
+#include <binder/IInterface.h>
+#include <batteryservice/IBatteryPropertiesListener.h>
+
+namespace android {
+
+// must be kept in sync with interface defined in IBatteryPropertiesRegistrar.aidl
+enum {
+    REGISTER_LISTENER = IBinder::FIRST_CALL_TRANSACTION,
+    UNREGISTER_LISTENER,
+};
+
+class IBatteryPropertiesRegistrar : public IInterface {
+public:
+    DECLARE_META_INTERFACE(BatteryPropertiesRegistrar);
+
+    virtual void registerListener(const sp<IBatteryPropertiesListener>& listener) = 0;
+    virtual void unregisterListener(const sp<IBatteryPropertiesListener>& listener) = 0;
+};
+
+class BnBatteryPropertiesRegistrar : public BnInterface<IBatteryPropertiesRegistrar> {
+public:
+    virtual status_t onTransact(uint32_t code, const Parcel& data,
+                                Parcel* reply, uint32_t flags = 0);
+};
+
+}; // namespace android
+
+#endif // ANDROID_IBATTERYPROPERTIESREGISTRAR_H
diff --git a/services/batteryservice/Android.mk b/services/batteryservice/Android.mk
new file mode 100644
index 0000000..0a29c36
--- /dev/null
+++ b/services/batteryservice/Android.mk
@@ -0,0 +1,17 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+	BatteryProperties.cpp \
+	IBatteryPropertiesListener.cpp \
+	IBatteryPropertiesRegistrar.cpp
+
+LOCAL_STATIC_LIBRARIES := \
+	libutils \
+	libbinder
+
+LOCAL_MODULE:= libbatteryservice
+
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_STATIC_LIBRARY)
diff --git a/services/batteryservice/BatteryProperties.cpp b/services/batteryservice/BatteryProperties.cpp
new file mode 100644
index 0000000..ab636a9
--- /dev/null
+++ b/services/batteryservice/BatteryProperties.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <batteryservice/BatteryService.h>
+#include <binder/Parcel.h>
+#include <utils/Errors.h>
+#include <utils/String8.h>
+#include <utils/String16.h>
+
+namespace android {
+
+/*
+ * Parcel read/write code must be kept in sync with
+ * frameworks/base/core/java/android/os/BatteryProperties.java
+ */
+
+status_t BatteryProperties::readFromParcel(Parcel* p) {
+    chargerAcOnline = p->readInt32() == 1 ? true : false;
+    chargerUsbOnline = p->readInt32() == 1 ? true : false;
+    chargerWirelessOnline = p->readInt32() == 1 ? true : false;
+    batteryStatus = p->readInt32();
+    batteryHealth = p->readInt32();
+    batteryPresent = p->readInt32() == 1 ? true : false;
+    batteryLevel = p->readInt32();
+    batteryVoltage = p->readInt32();
+    batteryTemperature = p->readInt32();
+    batteryTechnology = String8((p->readString16()).string());
+    return OK;
+}
+
+status_t BatteryProperties::writeToParcel(Parcel* p) const {
+    p->writeInt32(chargerAcOnline ? 1 : 0);
+    p->writeInt32(chargerUsbOnline ? 1 : 0);
+    p->writeInt32(chargerWirelessOnline ? 1 : 0);
+    p->writeInt32(batteryStatus);
+    p->writeInt32(batteryHealth);
+    p->writeInt32(batteryPresent ? 1 : 0);
+    p->writeInt32(batteryLevel);
+    p->writeInt32(batteryVoltage);
+    p->writeInt32(batteryTemperature);
+    p->writeString16(String16(batteryTechnology));
+    return OK;
+}
+
+}; // namespace android
diff --git a/services/batteryservice/IBatteryPropertiesListener.cpp b/services/batteryservice/IBatteryPropertiesListener.cpp
new file mode 100644
index 0000000..19ac7f0
--- /dev/null
+++ b/services/batteryservice/IBatteryPropertiesListener.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <batteryservice/IBatteryPropertiesListener.h>
+#include <binder/Parcel.h>
+
+namespace android {
+
+class BpBatteryPropertiesListener : public BpInterface<IBatteryPropertiesListener>
+{
+public:
+    BpBatteryPropertiesListener(const sp<IBinder>& impl)
+        : BpInterface<IBatteryPropertiesListener>(impl)
+    {
+    }
+
+    void batteryPropertiesChanged(struct BatteryProperties props)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IBatteryPropertiesListener::getInterfaceDescriptor());
+        data.writeInt32(1);
+        props.writeToParcel(&data);
+        status_t err = remote()->transact(TRANSACT_BATTERYPROPERTIESCHANGED, data, &reply, IBinder::FLAG_ONEWAY);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(BatteryPropertiesListener, "android.os.IBatteryPropertiesListener");
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
diff --git a/services/batteryservice/IBatteryPropertiesRegistrar.cpp b/services/batteryservice/IBatteryPropertiesRegistrar.cpp
new file mode 100644
index 0000000..6c2d2a5
--- /dev/null
+++ b/services/batteryservice/IBatteryPropertiesRegistrar.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "IBatteryPropertiesRegistrar"
+//#define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include <batteryservice/IBatteryPropertiesListener.h>
+#include <batteryservice/IBatteryPropertiesRegistrar.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <binder/Parcel.h>
+
+namespace android {
+
+class BpBatteryPropertiesRegistrar : public BpInterface<IBatteryPropertiesRegistrar> {
+public:
+    BpBatteryPropertiesRegistrar(const sp<IBinder>& impl)
+        : BpInterface<IBatteryPropertiesRegistrar>(impl) {}
+
+        void registerListener(const sp<IBatteryPropertiesListener>& listener) {
+            Parcel data;
+            data.writeInterfaceToken(IBatteryPropertiesRegistrar::getInterfaceDescriptor());
+            data.writeStrongBinder(listener->asBinder());
+            remote()->transact(REGISTER_LISTENER, data, NULL);
+        }
+
+        void unregisterListener(const sp<IBatteryPropertiesListener>& listener) {
+            Parcel data;
+            data.writeInterfaceToken(IBatteryPropertiesRegistrar::getInterfaceDescriptor());
+            data.writeStrongBinder(listener->asBinder());
+            remote()->transact(UNREGISTER_LISTENER, data, NULL);
+        }
+};
+
+IMPLEMENT_META_INTERFACE(BatteryPropertiesRegistrar, "android.os.IBatteryPropertiesRegistrar");
+
+status_t BnBatteryPropertiesRegistrar::onTransact(uint32_t code,
+                                                  const Parcel& data,
+                                                  Parcel* reply,
+                                                  uint32_t flags)
+{
+    switch(code) {
+        case REGISTER_LISTENER: {
+            CHECK_INTERFACE(IBatteryPropertiesRegistrar, data, reply);
+            sp<IBatteryPropertiesListener> listener =
+                interface_cast<IBatteryPropertiesListener>(data.readStrongBinder());
+            registerListener(listener);
+            return OK;
+        }
+
+        case UNREGISTER_LISTENER: {
+            CHECK_INTERFACE(IBatteryPropertiesRegistrar, data, reply);
+            sp<IBatteryPropertiesListener> listener =
+                interface_cast<IBatteryPropertiesListener>(data.readStrongBinder());
+            unregisterListener(listener);
+            return OK;
+        }
+    }
+    return BBinder::onTransact(code, data, reply, flags);
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android