Abstract: Methods, systems, and devices are disclosed herein for incorporating a power-saving sleep mode into electronic devices using an activity-based switch device. These switch devices may have with a communication module having more advanced electronics, such as wireless communications features. These switch devices may be built into electronic devices and/or batteries during manufacture, and/or may also be retrofitted into already existing electronic devices and/or batteries. A switch device may be placed between a power source, such as a battery, and the electronic device. When activity or motion is detected, the switch closes to connect the power source to the electronic device, thus turning the portable electronic device “on” as normal. However, when activity is not detected for a meaningful amount of time, the switch opens and disconnects power from the electronic device to conserve power, thus placing the portable electronic device into a power-saving sleep mode to conserve the power source.