My friend uses a Samsung Galaxy watch 4 I think it is. He's left his charging cradle at a friend's who isn't nearby so he decided to buy a 3rd party one from Amazon... It was rated highly and was cheap. He used it for a while one day but noticed the screen jumping at times and his watch heating up a lot so sent it back... This is when he told me and I told him to get on to the Samsung online shop for the 50% discount on accessories! Think he got an official watch charging cradle for just £12.