Q1: How long will it take to charge itself full? A:3 hours Q2: How long will it take to charge phone full? A:1.5 hour Q3: How long does it last after full charged? A:3 months Q4: Can I make sample order? A:Yes, sample order is welcome. Q5: Can I put my logo? A:OEM from 50sets, ODM from 500sets. Q6: What is your guarantee? A:18months, any broken, new free replacement together with next order.