System and a method for indicating information representing battery status of an electronic device

1. A wearable electronic device, comprising:

a rechargeable battery;

charging means for wireless charging of the rechargeable battery when the wearable electronic device is connected to a charging unit; and

wireless communication means for communication with the charging unit, the wireless communication means comprising an optical sensor, wherein the wireless communication means is operable to:

detect information representing a battery status of the wearable electronic device; and

communicate, to the charging unit, the detected information representing the battery status by pulsing the optical sensor in accordance with a frequency associated with the battery status.

2. The wearable electronic device of claim 1 , wherein the optical sensor is an infrared (IR) transmitter.

3. The wearable electronic device of claim 2 , wherein the IR transmitter is an IR light-emitting diode (LED) for performing optical sensing when the wearable electronic device is disconnected from the charging unit.

4. The wearable electronic device of claim 1 , wherein the detected information representing the battery status comprises a current charging status of the rechargeable battery, a voltage level of the rechargeable battery, an estimation of a remaining charging time to full charge of the rechargeable battery, or a combination thereof.

5. The wearable electronic device of claim 1 , wherein the wireless communication means comprises a Bluetooth radio communication unit, or a Bluetooth Low Energy radio communication unit.

6. The wearable electronic device of claim 1 , wherein the wearable electronic device is arranged on top of the charging unit for charging of the rechargeable battery when the wearable electronic device is connected to the charging unit.

7. The wearable electronic device of claim 1 , wherein the wireless communication means operable to communicate the detected information is further operable to:

communicate that the rechargeable battery comprises less than a full charge by the optical sensor being off.

8. The wearable electronic device of claim 1 , wherein the wireless communication means operable to communicate the detected information is further operable to:

communicate that the rechargeable battery comprises a full charge by turning the optical sensor on.

9. The wearable electronic device of claim 1 , wherein the wireless communication means operable to communicate the detected information is further operable to:

communicate a charge percentage of the rechargeable battery by pulsing the optical sensor in accordance with the frequency, wherein the frequency is associated with the charge percentage.

10. The wearable electronic device of claim 1 , wherein the wireless communication means is further operable to:

encode the detected information representing the battery status of the wearable electronic device into a pulsed data stream, wherein communicating the detected information comprises communicating the pulsed data stream.

11. The wearable electronic device of claim 1 , wherein the wireless communication means operable to detect the information is further operable to:

detect the information representing the battery status continuously while the wearable electronic device is connected to the charging unit.

12. The wearable electronic device of claim 1 , wherein the wireless communication means operable to detect the information is further operable to:

detect the information representing the battery status periodically in accordance with a time interval while the wearable electronic device is connected to the charging unit.

13. A charging unit for charging a wearable electronic device, comprising:

charging means for wireless charging of the wearable electronic device when the wearable electronic device is connected to the charging unit; and

wireless communication means for communicating with the wearable electronic device, the wireless communication means comprising an optical sensor, wherein the wireless communication means is operable to:

receive information representing a battery status of the wearable electronic device via the optical sensor, the charging unit further comprising:

indication means for indicating the information representing the battery status of the wearable electronic device, the indication means comprising one or more light-emitting diode indicators.

14. The charging unit of claim 13 , wherein the optical sensor is an infrared (IR) receiver.

15. The charging unit of claim 13 , wherein the information representing the battery status comprises a current charging status, a voltage level, an estimation of a remaining charging time to full charge, or a combination thereof.

16. The charging unit of claim 13 , wherein the wireless communication means is operable to determine a charge of the wearable electronic device based at least in part on the optical sensor detecting that an infrared (IR) transmitter of the wearable electronic device is on, off, or pulsing at a frequency with the charge.

17. The charging unit of claim 13 , wherein the indication means is operable to:

indicate the information representing the battery status of the wearable electronic device by emitting one or more colors from the one or more light-emitting diode indicators associated with the battery status, by blinking the one or more light-emitting diode indicators at a frequency associated with the battery status, or a combination thereof.

18. The charging unit of claim 13 , wherein the charging unit is further operable to:

recognize the wearable electronic device when the wearable electronic device is connected to the charging unit based at least in part on pairing, or the received information representing the battery status, or both.

19. The charging unit of claim 13 , wherein the wireless communication means comprises a Bluetooth receiver, or a Bluetooth Low Energy receiver.

20. A method for indicating information representing battery status of a wearable electronic device, the method comprising:

wirelessly receiving power from a charging unit to charge a battery of the wearable electronic device when the wearable electronic device is connected to the charging unit;

detecting information representing a battery status of the battery of the wearable electronic device; and

communicating the detected information representing the battery status from the wearable electronic device to the charging unit by pulsing an optical sensor in accordance with a frequency associated with the battery status.