Charging your phone in the car


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  1. WildWayz

    WildWayz Member This Topic's Starter

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    Hi all,

    I have had my Desire for a few days now, and yesterday we decided to go out for a drive, so I thought I would use the Sat Nav to get us about (NDrive).

    The battery in the phone was about half charged.

    Was listening to music whilst using the sat nav, and when we arrived at our destination, the battery was still reading half charge - even though it had been charging for over an hour in the car.

    is this normal?
     

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  2. SUroot

    SUroot Well-Known Member Developer

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    Audio + GPS + mobile data + AMOLED Screen Vs 1 hour charge from a car's 12v battery? I don't know for sure, but I should say so.

    What do you use to read your battery levels? if standard, it only displays in 10%'s so it could have increased / decreased slightly.
     
  3. albertshort

    albertshort New Member

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    I have seem soemthing similar when driving, even worse was that it didn't add charge to the phone, it decreased in charge, but only by a small percentage.
    Too many apps at once just doesn't seem to help when you are expecting the phone to run them all at once & charge at the same time.:(
     
  4. Johnrg

    Johnrg New Member

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    Most car charges only provide around 500mA to the phone, verse 1000mA provided by a mains charger.

    The phone will eat power doing all of those functions, and at only 500mA, it is only just enough to keep up, in some cases the phone will want to use even more juice and your battery will slowly lose charge.

    Check your car charger and if its only providing 500mA then I'd suggest purchasing a better one. Unfortunately that information tends not to be advertised when trying to buy the charger. I'm sure there is another thread on here that has links to some chargers that does provide 1000mA.

    Can I ask, did you phone get very hot during the car journey?
     
  5. pc99

    pc99 Member

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    It also depends on what charger you're using.

    The official charger and ones like the Brodit active charger short the data lines together and deliver more than 500mA when charging and therefore charge the phone more quickly.

    You can check what yours is doing by going to settings -> about phone -> battery. If it says "charging (ac)" the phone will be drawing around 800mA, if it says "charging (usb)" it'll only be drawing 500mA.

    I doctored a spare USB mains charger by shorting the data lines on a short USB extension cable, beats buying a spare charger (make sure if you try this that the charger can deliver more than 500mA though).
     
  6. WildWayz

    WildWayz Member This Topic's Starter

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    Defo doesnt get hot when charging via the car USB - or maybe it was hot... it was on the dashboard, and it was a sunny day (25c).

    Hmmm will check the charging status.

    Also, what battery app would you suggest instead of the default one?

    It was a Griffin Dual USB Charger - only one device connected tho
     
  7. gav28uk

    gav28uk Active Member

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  8. jred7469

    jred7469 Well-Known Member

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    I got one for
     
  9. SUroot

    SUroot Well-Known Member Developer

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    I monitor mine using a coupel of ways, the first is a 1% incremental widget called battery droid. Free on the market.

    I also use a paid app called System panel. It monitors battery and cpu etc. I dont use this all the time though. As it constantly monitors, it too drains power - but I find it usefull as I can look at individual apps (if its been in monitoring mode) and compare their cpu usage with battery drain.
     
  10. WildWayz

    WildWayz Member This Topic's Starter

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    Cheers Dan - will give that a go!
     
  11. WildWayz

    WildWayz Member This Topic's Starter

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    Well, I tried this car adaptor:
    Car iPod + iPhone 12V Cigarette Lighter Charger: Amazon.co.uk: Electronics & Photo
    It shows Charging (AC) - in the battery area...

    I drove for an hour and a half or so with Google Nav and bTunes running...

    Stopped at a service station and checked the battery and it had "Overheat" showing... the phone was VERY hot...

    Switched back to this one:
    Griffin PowerJolt Dual Charger MP3 Player - Black: Amazon.co.uk: Electronics & Photo
    Battery shows Charging (USB) and loses charge when sat nav and music is playing.

    So hmmmmmmm

    I think this phone cannot handle sat nav and music at the same time - the iPhone did it fine :(
     

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