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FIXED Zen 5000 mAh Powerbank

Zen 5000 Powerbank

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Purchased Powerbank has about half the capacity than listed.

This is not a defect. A capacity listed on the packaging is a capacity of the battery inside the Powerbank. The battery has a nominal voltage of 3.7 V while the USB output of the power bank has 5 V. Due to the change in output voltage and heat loss, the real capacity of the Powerbank is proportional to 0.6 - 0.65 times the value of the battery. That means that the Powerbank with reported

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