Abstract: An apparatus for estimating a condition of a battery includes a mode identifying unit configured to identify a usage mode of the battery during a period of time and its corresponding attenuation curve, according to recorded data on battery usage, stored usage modes of the battery and attenuation curves corresponding to the various usage modes, the attenuation curve representing a change of a fully charged capacity of the battery with battery usage; and a condition estimating unit configured to calculate battery degradation according to the recorded data, the identified usage mode and its corresponding attenuation curve, the degradation representing a quantity of the fully charged capacity of the battery that is reduced over the battery usage. The condition of the battery is estimated so as to rationally judge the residual value of the battery in operation.

Abstract: A USB cable (100), comprising: a power wire (1) transferring positive power, a pair of signal wires (2), a metallic braided layer (5) enclosing on the power wire and the signal wires, an insulative outer jacket (6) surrounding the metallic braided layer, and three drain wires disposed in the metallic braided layer. The power wire comprises a metallic inner conductor and an insulative layer surrounding the inner conductor, and the insulative layer of the power wire is made of Polypropylene. The three drain wires comprises a pair of first drain wires (31) and a second drain wire (32), and each first drain wire has a larger external dimension than the second drain wire.