Sony Xperia Tablet Z and Z Ultra not charging in car.

sonyjustbegun

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Jul 3, 2014
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As per title. Both charge from the mains and the USB ports on my laptop, printer and TV, the car charger works for all other devices I have except these two. I have changed the charger itself for one more powerful and the USB but no success I have even tried a straight cigarette lighter to micro-usb cable. However when you turn them both off they load up as if they are charging but simply show a battery without the little lightning symbol through it. Evidently it is an issue with those 2 devices. Thanks in advance.