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The Power sharing cable allows you to share power with other phones, tablets and devices with microUSB ports. Using a dedicated Power sharing App you can share your battery and control how much. Without the App, you wont get any alarms when power gets low and power will be shared until it is disconected .
Using the power sharing cable, you can always charge the battery. It's usable with a smart phone, tablets, Galaxy Gear, and devices with micro USB ports.