Bought 3 packs and all started well. Used the first 3 days until it broke. I figured it was just broken so I started using the second one which just lasted the rest of the day. The next morning I woke up and my phone wasn't charged. I don't move much when I'm in bed, so I think these chargers are just poorly made. The third has been running for 2 weeks now. I'm sure it will come out soon. They have no durability. I'll spend the extra money and get a good charger now. These things just throw money away.