Abstract: A case for a smartphone electronic device protects and extends the battery life of the smartphone. The case has a first case portion and a second case portion, which assemble together to protect the top, side, and bottom edges of the smartphone. The lower case portion includes a battery to extend the battery life of the electronic device.

Abstract: Disclosed is durable and water-resistant or water-proof communication accessory with a built-in battery for a mobile communication device capable of enclosing, powering, and protecting a mobile device and protecting it from dirt, water, weather, bumps, and scratches. The built-in battery can extend the battery operating time of mobile communication device while protecting the sensitive electronics, glass screen, and data.

Abstract: A durable and water-resistant or water-proof communication accessory with a built-in battery for a mobile communication device capable of enclosing, powering, and protecting a mobile device and protecting it from dirt, water, weather, bumps, and scratches. The built-in battery can extend the life of mobile communication device while protecting the sensitive electronics, glass screen, and data.

Abstract: A protective case can house a portable electronic device. The portable electronic device can have a switch (e.g., for switching an operational mode of the portable electronic device). The protective case can have a switch cover that engages the switch of the portable electronic device when the portable electronic device is in the protective case. The switch cover can be moved between positions corresponding to positions of the switch of the portable electronic device. As the switch cover is moved, the switch cover correspondingly moves the switch.

Abstract: A mobile device peripheral that incorporates a repeater antenna inside of a protective case for a mobile device to extend the range of short-range communications while minimizing interference caused by the thickness or materials of the protective case. The repeater antenna can be capable of receiving a wireless signal from an antenna in the mobile device and transmitting the same signal or an amplified version of the same signal. The repeater antenna can be capable of receiving a wireless signal from an external antenna and transmitting the same signal or an amplified version of the same signal to the mobile device. The mobile device peripheral can also include a battery that provides additional power the mobile device. Without a repeater antenna, the materials and/or thickness of the additional battery and/or the case can partially or completely block a short-range, low-frequency, or low-power communication signal such as Near Field Communication (NFC).