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+This example shows how to advertise a value of battery service data. The battery value is simulated.
+The battery level is a percentage, with 100% being a fully charged battery and 0% being a fully drained battery.
+The level starts at 50% and drains every second second, until it hits 10% when it jumps to 100% and continues draining.
+
+# Running the application
+
+## Requirements
+
+Hardware requirements are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+## Building instructions
+
+Building instructions for all samples are in the [main readme](https://github.com/ARMmbed/mbed-os-example-ble/blob/master/README.md).
+
+## Checking for success
+
+**Note:** Screens captures depicted below show what is expected from this example if the scanner used is *nRF Connect for Mobile* version 4.0.5. If you encounter any difficulties consider trying another scanner or another version of nRF Connect for Mobile. Alternative scanners may require reference to their manuals.
+
+1. Build the application and install it on your board as explained in the building instructions.
+1. Open the BLE scanner on your phone.
+1. Start a scan.
+
+    ![](img/start_scan.png)
+
+    **figure 1** How to start scan using nRF Connect for Mobile 4.0.5
+
+1. Find your device; it should be named `BATTERY`.
+
+    ![](img/scan_result.png)
+
+    **figure 2** Scan results using nRF Connect for Mobile 4.0.5
+
+1. Click on the entry to see the payload details
+
+   
+If you can see the battery level, and if its value is changing, the application is working properly.
+