The first had to be sent back because it didn't work and the second didn't want to work at first. About 2 minutes after turning it on, it started to work normally. I have no idea how it happened. It doesn't matter as it has been working ever since and charges the controllers very quickly. If you have 2 of these and use one at a time you will never be left without a charged controller. I only took one star off because of the bad and weird beginning of the second one.