If I were you I wouldn't... The cable has an extremely weak magnet, it comes off at the slightest touch. It would be impossible to use whilst the phone is charging. I could have got the really cheap cable from Amazon but because of the reviews about it's weak magnet I instead got a more expensive cable from mobilefun.co.uk. Unfortunately it was the same poor quality cable.
It's not that the magnet itself is weak, it's rather the design of it.
I can lift my phone with the magnet, even shake a little up and down without it falling off.
However, as you might know the easiest way to remove a magnet is to tilt/angle it, which the design of this magnet makes way too easy.
After all, the entire connector was designed around being mounted inside a charging stand, where the phone's angle to the connector would never change. Using it as a separate cable was never intended, the cable you can buy for example at dx-box is the very same cable that is supposed to be inside that charging stand.
I think if they designed a cable where the plastic around the magnet and the connectors was laying flush against the phone, tilting the cable would become less of an issue.
That said, I can use the phone just fine with the magnet connected as long as I don't pull on the cable, as the magnet is strong enough to handle the weight of the cable with no problem.