Abstract: The battery pack with the plurality of batteries is determined to have been fully charged and set in a stationary state, the discharge operation proceeds according to specified relationships of the voltage of each battery, a first predetermined voltage difference, and a discharge starting voltage, or the balance operation proceeds according to specified relationships of the voltage of each battery, the first predetermined voltage difference, a balance starting voltage and a second predetermined voltage difference.

Abstract: A curved plastic faucet contains: a body, an arcuate tube, connector, and a supply head. The body includes a connection member. The arcuate tube includes an inflow segment, an outflow segment, an arc-shaped section extending to ¼ circumference length of the inflow segment from the outflow segment, and an arcuate water conduit which has an imaginary arc line being an arcuate section of a circle and a length of the arcuate section is not more than ¼ of the circle, wherein a cross section of the arcuate water conduit proximate to the inflow segment is not more than that of the outflow segment, and an outlet is defined adjacent to a lower end of the outflow segment. The connector includes an inlet and at least one stop ring. The supply head includes a guide space and a second screwing portion mating with a first screwing portion.

Abstract: A curved plastic faucet contains: a body, an arcuate tube, connector, and a supply head. The body includes a connection member. The arcuate tube includes an inflow segment, an outflow segment, an arc-shaped section extending to ¼ circumference length of the inflow segment from the outflow segment, and an arcuate water conduit which has an imaginary arc line being an arcuate section of a circle and a length of the arcuate section is not more than ¼ of the circle, wherein a cross section of the arcuate water conduit proximate to the inflow segment is not more than that of the outflow segment, and an outlet is defined adjacent to a lower end of the outflow segment. The connector includes an inlet and at least one stop ring. The supply head includes a guide space and a second screwing portion mating with a first screwing portion.

Abstract: A composite faucet structure made of plastic and metal materials contains: a body, at least one inlet pipe, at least one positioning element, and at least one control valve. The body is injection molded from plastic material and includes at least one water chamber, each of the at least one inlet pipe is made of metal material and includes a connection portion having a groove. The at least one positioning element is retained in the groove of the connection portion of each inlet pipe, and each of the at least one control valve is fitted in the at least one water chamber of the body and includes an abutting face defined on a bottom of each control valve and contacting with an O ring, hence the connection portion of each inlet pipe contacts with the O ring of the abutting face of each control valve.

Abstract: A water spouting device includes a water spouting pipe and a pipe nut. This water spouting pipe includes a first passage, a second passage and a skirt line. A third opening of the second passage extends below the skirt line and sealed by a blocking plug. This pipe nut includes a threaded portion, a wall portion and a third passage. The wall portion of the pipe nut can surround the blocking plug. The entire water spouting device has only one beautiful color. In addition, it can reduce the total cost.