If you need power on the go, this Vivitar Power Bank delivers gobs of power for your USB-enabled device. Each power bank provides up to two complete charges, so with the two pack, there's plenty of backup power. This Vivitar power bank stores 4000mAh of power and can deliver that quickly to practically any USB-enabled rechargeable device. The two-pack delivers a total of 8000mAh of backup power and includes two USB charging cables. Model: V17089-2.
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