maybe because you ;

try change the usb cigarette port adapter. look for the one that got different ampere ratings.

that 1 is for radio ..i think cannot charge 1 ..nvm ..later i try on my car then let u know

btw ..if cigarette adaptor ..i using dual port( two port also 1A) ..very good ..RM15 only

probably the ampere for that usb port is lower than the requirement OR lumia required higher ampere to charge ...that why it wont work

Wechat got new update:

http://www.windowsphone.com/en-us/store/ap...95-da23a3442820

What’s New in Version 4.0
-  Free HD video calls.
-  Support for video messages: record a video and share it with your friends or loved ones.
-  Play audio messages in Handset Mode to keep your messages private.

same,i can't charge or play music on my honda crz.