Car charger not providing enough power? (Battery Drain while plugged in)

[FoxKat]

I'm assuming that maybe even though it says AC it still thinks its USB and therefore isn't drawing as much as it can. Honestly that's the only thing I can think of.

Regardless I can't argue with results as it seems to be working.

I would guess it determines whether it is plugged into AC or USB by the current available, along with whether there is any data connection, since the wall chargers provide more than earlier versions of USB.



Sent from my DROID RAZR using Tapatalk with speech to text translation. Please excuse any minor grammatical/punctuation/spelling errors.

 

[tpaege1]

If your phone is hot it wont charge.if your running an app that takes a lot of power it wont charge. If the charger is hot it may not charge.best guess.

 

[KayIslandDrunk]

My phone gets warm (and charges) when I plug the charger into the car last. If I just plug the cable into the phone after plugging in the charger you can see from my above results it does not charge, it also does not get the slightest bit warm.

 

[FoxKat]

My phone gets warm (and charges) when I plug the charger into the car last. If I just plug the cable into the phone after plugging in the charger you can see from my above results it does not charge, it also does not get the slightest bit warm.

Well if that works for you, great. For me, the cable is a cable. It has electrical contacts on either end that correspond to mating contacts in the jacks for connections inside the devices to which it attaches, and then it has electrical conductors (wires) running between either end to join the corresponding connections at either end. It's a set of bridges, if you will between contacts at point a and contacts at point b. It is nothing more than that, and plugging in either end first SHOULD have absolutely NO variance to the effect. If it were a "smart cable" that had some even minor logic or gate circuitry your results could be explained.

The results you are getting are no different than if you first plug a lamp into an extension cord and then plug the cord into the wall outlet as opposed to the first plugging the cord into the outlet and then the lamp into the cord. The same effect would result either way...a complete circuit would be made and electrons would begin to flow.

 

[KayIslandDrunk]

Completely agree with you. All my undergrad EE courses tell me its impossible, which is why I was thinking the phone must be limiting the draw somehow, so I posted this thread.