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PP-501 Ultra compact and small size power-bank, you can easily hold in your hand, backpack and pocket.PP-501 with 9 layers of protection - Protection from Temperature Resistance, Short Circuit, Reset Mechanism, Input Over-voltage Protection, Incorrect Insertion, Output Over-current, Output Over-voltage Protection, Overcharge and Over-discharge, PTC Protective Circuits for the Cell.Up to 90% conversion rate, best class chip not only safer, they improve charging conversion rates and stabilize disc |