- 11-03-2010, 03:08 PM #2
- 11-03-2010, 03:09 PM #3
ummm, my guess is it would charger a little bit faster, if onyl because the voltage produced by the car would be greater then your wall outlet and home. But as far as 3x faster, i dont know about that.Personal: Sprint Galaxy Nexus LTE, Nexus 7 16gb tablet
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- 11-03-2010, 03:32 PM #4
- 11-03-2010, 03:45 PM #5
- 11-03-2010, 04:10 PM #6
- 11-03-2010, 04:20 PM #7
- 12 Posts
Actually, both are going to be converted to 5V DC per the USB power spec.
The included wall charger is rated at 1A, so if the car charger is rated at 3A it would charge 3x faster. I highly doubt that it is rated at 3A, however, as that would heat the battery up considerably while charging and would be a safety risk.
- 11-03-2010, 04:39 PM #8
- 11-03-2010, 04:47 PM #9
- 11-03-2010, 04:57 PM #10
- 11-03-2010, 06:57 PM #11
- 11-03-2010, 09:21 PM #12
- 11-04-2010, 06:27 AM #13
In my car, I have a Kensington PowerBolt 2.1a USB power source/charger, and a modified USB cable which tricks my EVO into thinking it's on an AC charger. So......my EVO charges fastest in the car.
In the house, I have a 1.2a wall-wart USB power source/charger. Not too shabby either. But the charger in the car definitely outpaces it.
- 11-04-2010, 06:50 AM #14
Not sure about exact times and such, but I picked up a car charger from a non-corporate Sprint store for $10 and I think it was an AT&T branded micro usb and it is very fast....I can get from 20% to 80% from a trip from NJ to Brooklyn (40 minutes)..would recommend the AT&T car charger in an instant
- 11-04-2010, 07:43 AM #15
- 11-04-2010, 08:15 AM #16
Guys, all you need is a 1 amp charger. Period. Anything over 1 amp will not go faster, and anything under 1 amp will charge slower than the HTC AC charger. I know you all like to provide your own experiences, but there's really no reason to discuss it further, because this is the exact specs and design used on the EVO. It cannot, and will not draw more than 1 amp.
- 11-04-2010, 08:41 AM #17
- 11-04-2010, 08:56 AM #18
- 11-04-2010, 02:09 PM #19
I tested this with mine using an app that actually shows how many mah are being used. The car chargers were less than half of the wall charger consistently. My EVO charges much faster with the wall charger than it does with any USB charger, car or otherwise regardless of the charger's rating.Kyo 6035 > Kyo 7135 > Palm 800W > HTC EVO 4G > HTC EVOLTE + EVO View 4G
- 11-04-2010, 03:26 PM #20
Folks... it does NOT matter what the power SOURCE is.
DC 12v, DC 18v, AC 110v, AC 220v... all of that matters not a whit. There are only two things that matter:
DC 5 volt is being fed to the phone. All else is irrelevant wherever it comes from. Hence, why voltage doesn't matter--the phone can only use DC 5 volt.
Amperage: this determine how much "juice" is being drawn. Now folks, the power is not "pushed" to the device. The device "draws" the power from the available power source. The phone will draw only up to 1 amp. It was designed that. So, if you plug the phone into a DC 5V/10Amp source, it will only draw 1amp. If you plug the phone into the iPad's wall charger which is a 5v/2a source, it will still only continue to draw 1 amp. However, if you plug the phone into your computer's USB port, USB ports only have .5 Amp of 5v DC current. As a result, the phone can only draw .5 amps (or 500 miliamps) since that is all that is available.
Back the original question: Can a car charger charge 3x faster than the wall charger? Impossible. The phone will only draw 1amp of power, it matters not a whit if more juice is available.
- 11-04-2010, 05:16 PM #21
- 11-05-2010, 02:29 AM #22
- 11-05-2010, 02:32 AM #23
- 11-05-2010, 02:40 AM #24
A normal USB connection is limited to ~500ma, and unfortunately a great many chargers fit the spec. When the EVO senses a USB connection, it kicks down into slow charge.
You can hack a cable or a whole charger such that the EVO kicks into fast charge, but if the charger can't supply the 1a current, your fancy soldering will be for naught.
- 11-05-2010, 02:49 AM #25
The hardware hacks I've been referring to involve tying pin 2&3 of a USB cable together. Obviously, you must never use such a cable with a data-capable USB port,but when used with a properly designed power source, all kinds of goodness happens.
(I take no responsibility if anyone tries this and blows up their junk. YMMV CYA TYVM)