I have a wireless cell phone charger in my car dashboard. This device removed a lot of the extra wires that were exposed and dangling. Keep in mind that this will provide constant power to any device you plug in, even when the car is off. My car is a Camry Hybrid so battery drain is not a big issue. But if your car has a dead battery and is left unused for a long time, it can cause it to discharge. However, I expect it will be a long time since it only draws a milliamp. 7/17 EDIT: After about 2 years I started having problems with my micro USB connection. To be fair, this was most likely a weakness in the design of the USB, not this adapter. I'll buy another one for half the price of the original.
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