Dp-7800f portable battery Pro offers 7800mAh capacity that is capable of fully charging a mobile device for more than 2 times. Although portable and compact in design, it is still powerful enough to produce a maximum output at 2.1a. Portable battery Pro also comes with a built-in auto-shut off function that automatically shuts it off when it is done charging, or finishes charging a device, for safety and to prolong its usage time.
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