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TOPTAI power bank The longest life time

01 Jul 2017 - power bank factory,longest life time power bank,customize power bank

520 times re-charge & discharge lifetime,in all world longest life time power bank manufacturer ——toptai.

power bank self discharge and endurance test regime       The 5200mah portable charger is composed of two 2600mah batteries.These batteries are tested for endurance by charging and discharging them repeatedly to simulate use.One cycle refers to one charge and on e discharge of the battery.