| 摘要 |
An auxiliary battery of the present invention includes a first interface connectible to a power supply, a second interface connectible to a socket of a portable phone, a battery which is charged via the voltage supplied from the power supply through the first interface, and supplies the charged voltage to the portable phone through the second interface, and a speaker unit for reproducing, on a real-time basis, audio data provided from the portable phone through the second interface under the control of the portable phone. |
