DP-4400F Portable Battery PRO offers 4400mAh 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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