The link to the charging dock is a Chinese replica... And has issues over charging device.
As for the link containing the magnetic charging cord: cool design. But beware of the magnets they use... There's a lot of reviews out there of weak magnets that can hold the charger to the device well and it will alter your charge cycle. I have a $12 one like that in the picture and it was rated very well but is not worth it still.
The Sony magnetic dock is by far the best for the xperia z2 tablet. Charge a $500 device on a good quality charger... Not on a knock off!!!
Sent from my Nexus 5 Unchained using XDA Premium 4 mobile app