Hello there,It is nice to write to you. This is Gabe from the United States. I am interested in adding your 7000mAh Battery IP68 Conquest S11 smartphone to my inventory.Do you have any quality assurance certificates? Will you provide a price for one sample? If I like the sample I hope to purchase more and see how they sell. Hope you reply to all my questions so I could proceed with buying.Thank you for your timeGabekwilliam wholesaleThis Message is from mobile Show More