TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

USB Charging Speed Slow?

Discussion in 'Model 3' started by Dave EV, Jun 1, 2018.

  1. Dave EV

    Dave EV Active Member

    Joined:
    Jun 23, 2009
    Messages:
    1,229
    Location:
    San Diego
    What kind of charging speeds is everyone seeing in their Model 3?

    My Moto X4 (USB-C) only charges at 0.5A (confirmed with Ampere app and USB power meter). It's the same with both the front and rear USB ports. I've seen reports that it should charge at up to 2A. What are you getting?
     
    • Informative x 1
  2. Derek Kessler

    Derek Kessler Member

    Joined:
    Apr 15, 2016
    Messages:
    978
    Location:
    Cincinnati
    I do not recommend charging your Tesla via USB. It will take a very long time.
     
    • Funny x 15
  3. MarkBrokeIt

    MarkBrokeIt Supporting Member

    Joined:
    Apr 21, 2018
    Messages:
    134
    Location:
    Seattle
    I believe this is something that changed in a software update, but I don't recall what version had the change. A version before the "brake fix update" last weekend. But I'd expect that everyone got moved to that version by now, so perhaps they broke this again? Or it could also be an issue with the cable. Does it pull 2A with a different charger?
     
  4. Thunder7ga

    Thunder7ga Member

    Joined:
    May 20, 2018
    Messages:
    160
    Location:
    Johns Creek, GA
    LOL -- Infinite power if you plug the M3 into the dash USB slot.
     
  5. Glamisduner

    Glamisduner Active Member

    Joined:
    Aug 2, 2017
    Messages:
    1,176
    Location:
    Escondido, CA
    You can test your phone with accubattery to see the charge rate while the screen is off. But keep in mind that phones taper charge rates just like a tesla. Charges slow down as the phone tops off.
     
  6. animorph

    animorph Active Member

    Joined:
    Apr 1, 2016
    Messages:
    1,070
    Location:
    Scottsdale, AZ
    Make sure your cables have the necessary configuration to quick charge your phone. The Tesla USB ports may not have the appropriate configuration for your phone. I use a 12V power adapter with a USB-C fast charge output for my phone and another output that should fast charge other phones. Not sure how convenient that is in a 3.
     
  7. sroh

    sroh Member

    Joined:
    Sep 10, 2017
    Messages:
    183
    Location:
    San Jose, CA
    I do the same as @animorph. Fast charger plugged into the 12v in the center console if I need a charge. The USB cable underneath the phone compartment is cumbersome to get to, and it doesn't fit a Samsung S9+ very well when it's plugged in.

    At some point, I will get a wireless charging pad for that space and use it primarily. But I will still have the fast charger ready in case I need a quicker charge.
     
  8. Dave EV

    Dave EV Active Member

    Joined:
    Jun 23, 2009
    Messages:
    1,229
    Location:
    San Diego
    Same cable will charge at 2A on another charger, so cable isn't the issue.

    That's a handy tool - thanks for pointing it out.

    It's not that bad - trick is that you need a short 12V USB charger, otherwise the cable or charger will hit the tray that sits under the armrest where the 12V plug is.

    I've resorted to that for the time being for when I do need a quick charge. Kind of a bummer that Tesla didn't get this right.
     
  9. Beckler

    Beckler Member

    Joined:
    Oct 22, 2012
    Messages:
    580
    Location:
    Canada
    Did you try it more than once? I'd try another cable too. I've seen randomness in various testing myself. Anyway will be big disappointment if world's largest power bank is stuck with 2x500mA ports from 1997. :|
     
  10. buddhra

    buddhra Member

    Joined:
    Dec 29, 2017
    Messages:
    92
    Location:
    San Luis Obispo
    The best I've gotten is 1A on the front ports and 2.4A on the rears, but this was back in January on an older firmware version.

     
  11. Dave EV

    Dave EV Active Member

    Joined:
    Jun 23, 2009
    Messages:
    1,229
    Location:
    San Diego
    I've tried both the cable that comes with the car and another. I have a third type I can try, but I'm not hopeful.

    Yeah, I saw that video a while back - made me hopeful that the built-in USB ports would charge my phone at least at 1A - 2A would have been awesome.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC