Which off brand lightning charge cable for iPhone should I buy?

I have tried the cheaper ones on eBay and one from the tiger store but they wobble in the socket and don't charge it. Can anyone recommend a brand as I don't want to pay for the apple one.

(Also it isn't the phone that's faulty as a friends cable worked)

The apple one

If things wobble in the socket, then your SOCKET IS DIRTY. There's compacted dust in there, and it has compressed into a little felt bumper. So shut everything off - and use a wood or plastic toothpick to clean out the port. Do this over white paper, and you will be surprised how much you get out. Work with a strong light over you, like a desk lamp, so you can see in. Then blow it all out with canned air. Better? I can't tell you how many times I have DONE this for friends, and given the same advice here. Go ahead - look in the resolved questions - my name will come up zillions of times.