Abstract: A battery module includes a top cover and a bottom cover affixed together to accommodate a battery set, which has a conducting terminal device exposed out of the bottom cover for the connection of an external electronic device, and a movable member supported on the top surface of the bottom cover and held in a first position by spring members to block the through holes of the bottom cover and movable from the first position to a second position to open the through holes of the bottom cover for ventilation to dissipate heat when the battery module is connected to an external electronic device.

Abstract: A battery module includes a top cover and a bottom cover affixed together to accommodate a battery set, which has conducting terminals positioned in respective bottom side holes of the bottom cover for the contact of respective metal contacts of a battery charger or power hand tool. A movable member is sleeved onto the battery set inside the bottom cover and held in a first position by spring members to block side holes of the bottom cover and movable from the first position to a second position to open the side holes of the bottom cover for ventilation to dissipate heat upon insertion of the battery module in a battery charger for charging.

Abstract: An attached tire pressure sensor and air nozzle assembly includes an air nozzle for installation in the rim of a vehicle wheel, an attached tire pressure sensor threadedly coupled with the air nozzle for sensing the tire pressure of the vehicle wheel, and an anti-loosing device sandwiched between the air nozzle and the attached tire pressure sensor. The anti-loosing device has a rigid base stopped against the air nozzle, and a curved spring washer stopped against the attached tire pressure sensor to provide a spring force to the air nozzle and the attached tire pressure for preventing the attached tire pressure sensor from loosing from the air nozzle upon receiving vibration or accidental impact of the vehicle wheel during running of the vehicle.

Abstract: A battery module includes a top cover and a bottom cover affixed together to accommodate a battery set, which has a conducting terminal device exposed out of the bottom cover for the connection of an external electronic device, and a movable member supported on the top surface of the bottom cover and held in a first position by spring members to block the through holes of the bottom cover and movable from the first position to a second position to open the through holes of the bottom cover for ventilation to dissipate heat when the battery module is connected to an external electronic device.

Abstract: A battery charger for charging a battery of a power hand tool includes a housing with a charging chamber for receiving the battery under charging, air vents for ventilation, and a communication hole in communication with the charging chamber, a charging circuit assembly mounted inside the housing, a fan mounted inside the housing and electrically connected to the charging circuit assembly and having a first ventilation side facing the air vents and a second ventilation side opposite to the first ventilation side, and an ventilation unit in air communication between the communication hole and the second ventilation side of the fan for guiding air out of the charging chamber to the outside of the housing through the air vents during operation of the fan and charging of a battery by the charging circuit assembly.

Abstract: An attached tire pressure sensor and air nozzle assembly includes an air nozzle for installation in the rim of a vehicle wheel, an attached tire pressure sensor threadedly coupled with the air nozzle for sensing the tire pressure of the vehicle wheel, and an anti-loosing device sandwiched between the air nozzle and the attached tire pressure sensor. The anti-loosing device has a rigid base stopped against the air nozzle, and a curved spring washer stopped against the attached tire pressure sensor to provide a spring force to the air nozzle and the attached tire pressure for preventing the attached tire pressure sensor from loosing from the air nozzle upon receiving vibration or accidental impact of the vehicle wheel during running of the vehicle.