Is the old charger rumor true?

Discussion in 'Droid RAZR Support' started by gamer6592, Nov 23, 2011.

  1. Snow02
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    Snow02 New Member

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    Nope. A simplified way to think about it: a device pulls current, and that current is pushed by voltage. Push that current too hard, something breaks, don't push hard enough, nothing happens. But a device won't pull more current than it needs.
  2. FoxKat
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    FoxKat DF Super Moderator Staff Member Premium Member

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    First, I think you mean 5V, not 5w. Second, the one that comes with the Droid RAZR is rated at an output of 5.1v, 750mah, so it is actually capable of a higher charge current than the one you mentioned from your Blackberry Storm. So the only way that it could have "improved" your battery life is if by charging at a slower rate (700mah versus the suggested 750mah), it is actually providing a more complete charge - be it over a longer charging period.

    Also worth mentioning, these phones are now monitoring your usage patterns even more closely and making minute but relevant changes to how they consume the power, so it is often reported that without any changes to the power supply, the phones are getting better battery life weeks later after activation.

    Otherwise, it is a placebo effect.
  3. FoxKat
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    FoxKat DF Super Moderator Staff Member Premium Member

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    WRONG!! First, you need to test the voltage while the load is present (i.e. while the phone is connected) to get a true reading of voltage. Second, if the voltage is higher than the rated voltage for the phone, you risk doing irreparable damage to the microscopic circuitry inside those chips. There are VERY TIGHT tolerances to voltage. Amperage (or mah as it may be) is not a concern. Just as Snow02 says, the current must be AT LEAST high enough, but can be essentially infinitely higher. The device will only pull the current it needs. On the other hand, if the voltage is too high, you risk both overvoltage damage, and if the charger supplies higher current than needed - also overcurrent damage. Either way, it's a $799.99 paperweight at some point.
  4. brucin
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    brucin Member

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    I use the chargers from my original Razr and Moto Q9m on my D1 and have never had an issue and I intend to use them on my Droid Razr.
  5. Erikbal
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    Erikbal Member

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    My moto charger is hard to read but says I believe output 5.1v 850ma. My moms LG that I use says output 5.1v 0.7a. So what's the difference? According to FoxKats post I should be fine cuz the voltage is the same rating right?

    Sent from my DROID3 using DroidForums
    Last edited: Nov 29, 2011
  6. FoxKat
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    FoxKat DF Super Moderator Staff Member Premium Member

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    You are right, to a point. The voltage is the same, and the amperage is at least as much as your Moto charger (though I am wondering what charger?), but there is nothing on any of these chargers that talk about how CLEAN the waveform of power is. Just because LG is a top manufacturer, and so is Motorola, doesn't mean both chargers will be comparably good at smoothing out the spikes and noise on the power waveform. Since these devices use a Capacitive Touch display, and they are extra-sensitive to such things as dirty current, RF interference, moisture, dirt, etc., we'd do ourselves good to stay away from using power supplies that aren't designed specifically for these devices.

    Also, having more amperage (either ###ma or 0.##a), isn't necessarily a good thing either. MY RAZR charger, the one that came with it in the box is rated at 750ma (or 0.75a). Motorola obviously chose 750ma for a reason, since the ones that came with my Droid 1 and Droid 2 both were 850ma. A lower amperage means slower charge, which can be translated into many different and beneficial things. For instance, lower charge rate will heat the battery up less, it will give the battery a better chance to move all the free ions into their available spaces to store power more efficiently, it will draw less current from the wall (not really a concern considering the minute amount it pulls, but still...), it will likely be physically smaller (it's tiny for mine, ). and perhaps other reasons I can't come up with at the moment.

    See below. The cute little cube charger with the folding power prongs...RAZR!! The other one, D1/D2.

    View attachment 43000 View attachment 43001 View attachment 43002 View attachment 43003 View attachment 43004
  7. JohnJ1017
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    JohnJ1017 New Member

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    Why is it then, that the car charger Verizon offers as a bundle with the new phone purchase is the same charger they give to any phone that uses a micro
    Usb plug?

    the one they gave me with my razr is the same one they gave with my Samsung charge and the same one they gave my friend with his thunderbolt?
  8. Stevetx1989
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    Stevetx1989 New Member

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    Probably because car chargers are for a quick charge. Not to be used from dead to full battery. That's why people say not to leave it on a car charger for more than hour.

    Sent from my DROID2 using DroidForums
  9. Snow02
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    Snow02 New Member

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    That's a pretty old-school adage and not applicable anymore. Todays smartphones use better charge circuitry than old feature phones. Car charging is perfectly fine.
  10. Stevetx1989
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    Stevetx1989 New Member

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    Good to know. I just hold information. Old still sticks, not up to date with new. Ya learn something new everyday.

    Sent from my DROID2 using DroidForums
  11. JohnJ1017
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    JohnJ1017 New Member

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    The Razr comes with a small "Cube shaped" adapter that gets plugged into an electrical outlet and a USB cable that plugs into the "cube" and the phone.
    Is it ok to use a different USB cable (longer one) as long as I am using the adapter plug that came with the phone?
  12. Snow02
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    Snow02 New Member

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    Yep. Shouldn't be a problem. There are slight differences in the plug depth of some cables. Primarily, Samsung phones like a more shallow plug, and may not work properly (no data and/or charging) with deeper plugs. But for the most part they're all interchangeable.
  13. JohnJ1017
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    JohnJ1017 New Member

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    Ok, thanks.. so to be clear here, it is the adapter plug (cube thing) that everyone here is saying must be the one that came with the phone?
  14. bws2007
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    bws2007 New Member

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    Just make sure that the charger has the smart chips in them and u will b fine i was a manager and b4 that a tech rep and it was the chargers with out the smart chips that had problems with most of the Android based phones!!
  15. Snow02
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    Snow02 New Member

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    The bottom line - use any charger/cable combo unless it gives you problems. The most common manifestation of a charger-related problem is a wacky touchscreen.
  16. Erikbal
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    Erikbal Member

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    Yeah it's weird even tho I can charge with my mom's charger perfectly fine, as stated earlier it will not work to connect to the cornputer.

    Sent from my DROID3 using DroidForums
  17. Heywood
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    Heywood New Member

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    I charge my DX2 with a Samsung prepaid phone charger. No issues, been using it for 6 months.
  18. FoxKat
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    FoxKat DF Super Moderator Staff Member Premium Member

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    No doubt. Charging is most often not a problem, it's as Snow02 said "a wacky touchscreen", and this is only apparent if you use the phone while connected to one of the chargers that have this issue. Still, if the phone fails, make sure you don't tell them you were using a non-Motorola or Verizon charger approved for use with this phone. The phones are getting smarter as time goes on, and there's the possibility that at some point the phones will know whose charge is being connected and will either refuse to accept, or may make history notations of such.

    As it is now, I have non-Motorola batteries for my D2 (no hologram, but the label looks legit), that I got on auction at eBay, and when they are fully charged on an external charger, and then inserted into the phone, the battery level indicator shows a "?". When I plug the phone in, the phone responds that the battery is not approved and it refuses to charge that battery. It still works but there's no battery meter, so I don't know how long it's going to last and when it's going to shut down, and it does so without any warning from working to dead in the blink of an eye. I keep them only to use as backups until I can fully charge the Motorola batteries again.
  19. CN0TE
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    CN0TE New Member

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    So I'm having the "wacky screen" problems (Unresponsive screen, screen turns off randomly, etc.) even though I'm using the charger that came with my Razr. Any ideas why?
    Last edited: Dec 2, 2011
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