Abstract: A handheld device for jump starting a vehicle engine includes a rechargeable lithium ion battery pack and a microcontroller. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected in circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs, such that the microcontroller will enable power to be delivered from the lithium ion power pack to the output port only when a good battery is connected to the output port and only when the battery is connected with proper polarity of positive and negative terminals.

Abstract: A handheld device for jump starting a vehicle engine includes a rechargeable lithium ion battery pack and a microcontroller. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected in circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs, such that the microcontroller will enable power to be delivered from the lithium ion power pack to the output port only when a good battery is connected to the output port and only when the battery is connected with proper polarity of positive and negative terminals.

Abstract: A device for securing indoor electrical outlets, light switches, telephone jacks, computer network outlets, etc., from the reach of a young child is provided. The device can be easily installed over any standard outlet or switch. The device comprises a two-piece structure: the first piece includes a plate and a first hinge portion, and the second piece includes a cover and a second hinge portion. The plate is adapted to substantially cover the outlet or switch but still leave access to it when the cover is open, and the cover is adapted to substantially cover the first plate such that the outlet or switch is no longer accessible when the cover is closed. The plate is hingeably attached to the cover. The hinge comprises a first hinge portion integrally part of the plate and a second hinge portion integrally part of the cover. The device further includes a child-resistant lock.

Abstract: A device for securing electrical outlets, switches, telephone jacks, computer network outlets, etc., from the reach of a young child is provided. The device can be easily installed over any standard outlet or switch. The device is made as a single piece and comprises a first portion adapted to substantially cover the outlet or switch but leaving access to it, a second portion adapted to cover the first portion such that the outlet or switch is no longer accessible when the second portion is in a closed position, and a third portion, between the first portion and the second portion, forming a living hinge allowing the device to bend along a line of the hinge. The device further includes a child-resistant lock. Preferably, the device has a sleek design and protrudes no more than necessary (e.g., in the case of an electrical outlet, no more than one-half inch) from the wall when installed.