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  1. #26  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by Rockn View Post
    Should I expect more?
    Probably. Unless their is some odd internal electrical limitation where the phone cannot charge the battery at the same time it supplies full power to it's own circuitry (and this would be an odd limitation, but anything is possible) not adding charge while on a charger could mean a couple things:

    1) The charger can't supply enough current. Some chargers this is clearly the case, others it would seem it shouldn't be. I think 2 amps should be plenty, and 3 amps more than enough. If your phone was drawing 2 amps from an 1850mAh battery it would be dead in less than one hour. Seeing that this doesn't happen, a 2 amp charger is probably enough. Although 3 is probably good for charging margin.

    2) The resistor from D+ to D- in the USB port is somehow telling the phone it can't supply enough curent. Thought all this did was tell it AC or USB, with AC being "unlimited". Unless the phone is somehow imposing an arbitrary current draw limit.

    This does raise the question of phone-charger interaction. We already know about the D+/- resistor. Does the phone also look for voltage drop at the USB power pins as an indication of insufficient capacity and limit the current draw? Does it arbitrarily limit it to a fixed value "just in case"? Things like this would limit charging effectiveness outside of a decent charger.
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  2. #27  

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    Quote Originally Posted by Stinkpickle View Post
    Moto rapid charger all the way! Got one with my DROID X car mount, works well.

    Sent from my Galaxy Nexus using Tapatalk
    Had this one and it wasn't working on my nexus

    Sent from my Galaxy Nexus using Tapatalk
  3. #28  

    Default Re: Best car charger for Nexus?

    I have a new Verizon Galaxy Nexus, and need a car charger. I've been reading this and other threads, and have a few data points:

    The official Verizon car charger, when connected directly to my SGN is shown charging as "AC" as it should. Things get complicated when the accessory USB plug is used:

    With the USB cable from my wife's previous LV Env Touch, my phone does not show any charging connection whatsoever.

    With a cable I just bought from Monoprice (), for $.96, my Nexus does show a charger present, but as "USB" and not "AC".

    When I use this same Monoprice cable with the Verizon AC Wall Plug that came with it, My Nexus again shows "AC" so the cable is fine, and capable of delivering the proper connections and power.


    Bottom line - you do need the right cable, and the right charger. Verizon's definitely delivers what is needed on the primary connection, but the secondary one apparently functions differently.

    I'd get the Verizon one, but I don't like the 'curled' cord - I have to route it across the dash area to where my vent mount is placed, and need a regular cord. Guess I'll just have to buy and try, and see which ones function properly.

    Hope this of help to others trying to resolve all of this.
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  4. #29  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by lifespeed757 View Post
    Probably. Unless their is some odd internal electrical limitation where the phone cannot charge the battery at the same time it supplies full power to it's own circuitry (and this would be an odd limitation, but anything is possible) not adding charge while on a charger could mean a couple things:

    1) The charger can't supply enough current. Some chargers this is clearly the case, others it would seem it shouldn't be. I think 2 amps should be plenty, and 3 amps more than enough. If your phone was drawing 2 amps from an 1850mAh battery it would be dead in less than one hour. Seeing that this doesn't happen, a 2 amp charger is probably enough. Although 3 is probably good for charging margin.

    2) The resistor from D+ to D- in the USB port is somehow telling the phone it can't supply enough curent. Thought all this did was tell it AC or USB, with AC being "unlimited". Unless the phone is somehow imposing an arbitrary current draw limit.

    This does raise the question of phone-charger interaction. We already know about the D+/- resistor. Does the phone also look for voltage drop at the USB power pins as an indication of insufficient capacity and limit the current draw? Does it arbitrarily limit it to a fixed value "just in case"? Things like this would limit charging effectiveness outside of a decent charger.
    Made the same trip yesterday and watched the charger and phone more closely - frequently the charger was working itself loose in the socket! I did note that the Nexus reported A/C charging and since I watched for the little red LED on the charger to go out, I arrived at my destination fully charged (to 97% which is as good as it ever gets from 10% at start of the trip) while running Nav, Bluetooth and an Internet radio station on 4G for almost two hours.
    Last edited by Rockn; 12-25-2011 at 09:09 AM.
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  5. Thread Author  Thread Author    #30  
    KoukiFC3S's Avatar
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    Default Re: Best car charger for Nexus?

    So it looks like if the phone shows that it's charging as AC power, then it's getting the full 1A+ of the car charger.

    I just checked my tunelink 2A charger, and its charging status is USB. That means it's only getting 500ma of charging power from the 2A. No wonder it doesn't keep up.

    I'm gonna try a few more USB cables, and see if I can find a good one that will let me take advantage of the full power.
  6. #31  
    Nakrohtap's Avatar

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    Default Re: Best car charger for Nexus?

    Quote Originally Posted by LandLockedPH View Post
    Absolutely agree. I bought three of these for the three Samsung Fascinates my wife, daughter and I have had up until now and they work great! High output (4.75-5.25V 950mA) and no issues. And, inexpensive!
    Quote Originally Posted by DCoy82 View Post
    I have been using these for years. They are cheap, and they work very good and don't destroy your battery like some car chargers will. Also it has a nice blue glow. Give it a shot it's less than 5 bucks.

    Amazon.com: Motorola Vehicle Power Adapter micro-USB Rapid Rate Charger: Cell Phones & Accessories
    I have been using this one since I bought my OG Droid. It seems to charge pretty good still with the Nexus. However, the only thing I do not like about this charger is the connection. You don't get the nice snug fit you get with the OEM Nexus wall charger. The Moto charger connector seems to wobble a little once it's used often. This tends to not charge the phone if the cable is moved slightly.
    Since I haven't really found another car charger in this price range with enough juice to charge the Nexus, I will probably just fork out another $5 for another one.
  7. #32  

    Default Re: Best car charger for Nexus?

    I just traveled about two hours in the car, streaming audio over bluetooth and going in and out of 4G/3G reception. Incase's usb car charger, the one designed to charge an iPad, got me from 87% to 100% during the trip. It worked just fine with a usb to micro usb cable instead of the 30-pin Apple cable. Now whether it also works with navigation running in purely 4G territory is another thing entirely.
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  8. #33  
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    Default Re: Best car charger for Nexus?

    Quote Originally Posted by KoukiFC3S View Post
    I'm gonna try a few more USB cables, and see if I can find a good one that will let me take advantage of the full power.
    I just ordered a "charging only" micro usb cable. I have heard of some better reports using those. will see how it goes.
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  9. #34  
    CarryMe's Avatar
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    Default Re: Best car charger for Nexus?

    Does anyone know much about the VZW charger? I think it is 2.1 amps. Does anyone know for sure?
  10. #35  

    Default Re: Best car charger for Nexus?

    Since it is so hard to find the specs for the VZW charger I have, I am beginning to suspect that they vary from production to production coming out of China. They won't state the specs because they change all the time. Having said that, I think I have one from VZW with the 2 ports that matches the Nexus, or at least close enough that it meets my needs. If it fails someday, I will do a lot more research and buy one that guarantees the specs meet the Nexus with a 2140MhA battery, no matter who makes it.
  11. #36  

    Default Re: Best car charger for Nexus?

    Its probably also worth noting that some phones will disable charging if the battery gets too hot as a way to keep the battery living a long happy life. Excessive heat will lead to premature battery failure.

    If your running Navigation your probably draining the battery pretty good and that will heat the battery up, so depending on the interior car temp, it might be getting too hot while draining and charging and the charging might get disabled until the temps are low enough.
  12. #37  
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    I use a vent mount universal cradle when I am charging and running GPS. This setup works great in the summer when I have the air conditioning blowing on the phone. I can easily reach a full charge. The setup is a disaster in the winter with heat coming out of the vents making the phone get too hot and drain the battery quicker than it is charging. The internal car temperature, and your ability to locate your phone in a location that keeps it cool, will play a huge role in how easy it is to charge your phone.

    Sent from my Galaxy Nexus using Tapatalk
  13. #38  

    Default Re: Best car charger for Nexus?

    Has anyone tried the "AmazonBasics" 2 amp charger?

    http://www.amazon.com/AmazonBasics-2...idcentral00-20
  14. #39  
    dmmarck's Avatar
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    Default Re: Best car charger for Nexus?

    I've been using a Rocketfish (I believe ~650mA) that I picked up at Best Buy. Obviously, it can't really keep up under any normal usage. I turn off all networks if I can. Will be looking to get a new one ASAP.
  15. #40  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by triton. View Post
    I haven't, but according to This Review, it won't be any different from the others. In particular, check out a few of the comments on that Review. It also states that without the soldering, any of these stand-alone chargers will be seen as "USB" and not draw the current to be seen as "AC".
  16. #41  

    Default Re: Best car charger for Nexus?

    So are there any Car chargers that will work as AC fro the nexus? This shouldn't be so hard to find.
    KoukiFC3S and tarheel03 like this.
  17. #42  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by triton. View Post
    So are there any Car chargers that will work as AC fro the nexus? This shouldn't be so hard to find.
    As I indicated above, the stock Verizon charger, or the "Just Wireless" one, using the built-in 'coiled' cable with the micro USB connector at the end, work just fine, and are seen as "AC". If you use the secondary USB port on these devices, with a separate USB cable, it will be seen as "USB" and doesn't deliver the same current as when you use the built-in cable/connection.

    The problem is finding a "free-standing" car charger - that is, one with only the bare USB port(s) - where you would use a separate USB/MicroUSB cable - that will deliver the proper current to be seen as "AC". I have yet to find or identify one that does this.
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  18. #43  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by triton. View Post
    So are there any Car chargers that will work as AC fro the nexus? This shouldn't be so hard to find.
    It's harder than you think. My understanding of the problem is that Apple, as they always seem to do, refused to comply with the USB charging standard of a 200 ohm resistor across the data terminals indicating high-current (AC) capability.

    So, as they were first to market with their closed proprietary product, all the car kit chargers scrambled to support Apple's non-standard implementation. Which shows up as USB charging for devices that follow the standard. At least that is my understanding of why it is so hard to find car kit chargers that actually charge a non-fruit phone properly.

    PS - I did try using Nav with a car charger that only does USB charging and indeed it is inadequate, sometimes actually losing charge over time.
  19. #44  

    Default Re: Best car charger for Nexus?

    Thanks DLC. So the Motorola one should work then here on amazon? Looks like it gives .95 amps, which is better than the .5 amps that most will give. Do you have a link for the verizon one, or is that just the one they sell at the stores?

    Amazon.com: Motorola Vehicle Power Adapter micro-USB Rapid Rate Charger: Cell Phones & Accessories
  20. #45  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by triton. View Post
    Thanks DLC. So the Motorola one should work then here on amazon? Looks like it gives .95 amps, which is better than the .5 amps that most will give. Do you have a link for the verizon one, or is that just the one they sell at the stores?

    Amazon.com: Motorola Vehicle Power Adapter micro-USB Rapid Rate Charger: Cell Phones & Accessories
    I haven't used it personally, so I can't say for sure, but I have read posts from numerous people on a few forums, that this works just as well as the standard Verizon charger, and is definitely cheaper!

    And yes, the Verizon one is just the one they sell at the store. "On Sale" recently for $19.99, for what it'w worth - don't know if the sale is still going.
  21. #46  

    Default Please post Dual charger that indicates AC

    So far it seems there have been a couple single-port 12V DC car chargers that properly indicate high current (AC) charge under settings/about phone/status.

    This is what we need to know: does the phone indicate USB or AC charging?

    It can be a 2.1A charger, but if it doesn't short D+ to D- to tell the device it is high current it will be useless as the phone limits it's draw to no more than the USB-standard 500mA.

    So check your phone indications before you go bragging "my charger works fine". If it does not indicate AC charge your Galaxy Nexus can easily overrun the 500mA and actually slowly discharge thanks to it's huge bright screen, GPS, etc.

    I am looking for a dual to charge both our phones. Please reply with models that fit the bill.

    I can contribute the following info:

    Nexus One car dock charger (single): AC charging
    Griffin powerjolt duo (dual): USB charging
    Black and Decker 12V AC inverter USB port (single): USB charging

    Edit: There is some USB/AC data in
    Last edited by lifespeed757; 01-01-2012 at 05:39 PM.
  22. #47  
    DCoy82's Avatar

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    The Motorola car charger shows as AC in the menus during charge, not USB.

    Sent from my A500 using Tapatalk
  23. #48  

    Default

    Quote Originally Posted by DCoy82 View Post
    The Motorola car charger shows as AC in the menus during charge, not USB.

    Sent from my A500 using Tapatalk
    This one sounded promising. Anybody know of a dual USB unit that will AC charge?

    Lifespeed
    Last edited by lifespeed757; 01-02-2012 at 12:38 AM.
  24. #49  

    Default Re: Best car charger for Nexus?

    Did some research myself on car chargers and found that this one will do "AC" charging on the gnex with a regular micro USB cable:
    HTC oem car charger @ amazon
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  25. #50  

    Default Re: Best car charger for Nexus?

    Quote Originally Posted by acm25 View Post
    Did some research myself on car chargers and found that this one will do "AC" charging on the gnex with a regular micro USB cable:
    HTC oem car charger @ amazon
    Great find! The reviews all indicate that it is wired properly for full current delivery.

    Does your post mean that you actually have one, use it with a Galaxy Nexus, and that it is shown as "AC" while charging?
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