Great product, fast delivery and very good pricing. I surprisingly found this Pisen power charger does good or better than Apple. Intelligent built-in units help this power station recognize the voltage of the inserting smart devices automatically. It is the perfect charger for home or travel. The large capacity of Li-ion battery is 2500mAh, as it can recycle charge over 1000 times. Love this portable power station for smartphones digital products and the seller was perfect!