Why won't my phone charge with the car charger?

[AC Question]

why won't my phone charge with the car charger

When I plug my phone into the car charger it doesn't charge but it works in the house

 

[B. Diddy]

Re: why won't my phone charge with the car charger

Welcome to Android Central! Which phone? Is the car charger a combined plug and cable, or is it only a plug that you can use your own USB cable with? What amperage is specified on the charger itself? Some car chargers provide pretty low amperage, so that if you're actively using the device, the battery usage may still outstrip the charging rate.