I have a Kingston 1A universal car charger and It barely can keep up with the phone, and thats when its off. if the screen is on, forget about it. it just keeps draining, slowly but yeah almost useless. after a 20 minute drive home, the phone battery went up maybe 2% while not in use, screen off.

I have since ordered another 2A car charger from DX, hope it arrives soon. however I have doubts as to weather 1 HR charges are even possible. not saying you're lying, but there is something amiss.

regardless. can you try a test? drain your battery, then do a full charge in the car or even 50% if possible. (I know driving for 1 hr is asking too much). from that point see how much usage you can get out of the phone.

* note, as you drive, the cars voltage is actually closer to 14V than the normal 12V when the engine is off and alternator not running.

I wonder if using this quick car charger will produce the same results with a 12V battery pack or Jump-Start kit?

if its roughly half of what you normally get, you are right. 1 hr charges, outstanding.

worse case, this charger is messing something up and you may left with a dead battery when you think its full.

Originally Posted by madman604

I have a Kingston 1A universal car charger and It barely can keep up with the phone, and thats when its off. if the screen is on, forget about it. it just keeps draining, slowly but yeah almost useless. after a 20 minute drive home, the phone battery went up maybe 2% while not in use, screen off.

I have since ordered another 2A car charger from DX, hope it arrives soon. however I have doubts as to weather 1 HR charges are even possible. not saying you're lying, but there is something amiss.

regardless. can you try a test? drain your battery, then do a full charge in the car or even 50% if possible. (I know driving for 1 hr is asking too much). from that point see how much usage you can get out of the phone.

* note, as you drive, the cars voltage is actually closer to 14V than the normal 12V when the engine is off and alternator not running.

I wonder if using this quick car charger will produce the same results with a 12V battery pack or Jump-Start kit?

if its roughly half of what you normally get, you are right. 1 hr charges, outstanding.

worse case, this charger is messing something up and you may left with a dead battery when you think its full.

1 hour may be a bit of an exaggeration. But it can get from 10-15% to 85-100% in an hour. Not saying exactly an hour from dead to full. And it can do this with the car on or off. Depends on the vehicle though as some vehicles can't charge anything if they're in off mode. .

Then again, this guy thought I was serious when I said the sensation took 8 days to charge.

Also, the stock charger like Allgamer says, will drain if you're using the phone. The t-mobile branded ones, can charge them easily while using them.


P.S. Thanks for editing that Allgamer. As the profanity wasn't needed tbh. But sometimes you have to use aggression when one track minded people are stuck on one track.

Originally Posted by The_Biz

DUDE!

Try the charger I mentioned and then come back here and tell me how your phone is messed up, reading wrong, charging wrong, stupid, can't read its own charge rate, eats twinkies or whatever.. Jeezus...

The t-mobile branded chargers, charge faster than the stock chargers. I've tried this on a hd2, blackberries, htc sensation and a t-mobile sgs2..... . Some people, boy I'll tell ya.

I have had these car chargers for a year and every phone I've hooked it to, can charge really fast. But I guess there's no way on earth, according to you, this is possible.

T-mobiles chargers are rapid chargers. Even nextel use to sell rapid chargers for their phones. The phones came with a slow charger, and they sold a faster charger for like $20. That was back in the 90's.

And I have 3 t-mobile branded chargers. So I guess all of them and the phones are all damaged.

---------- Post added at 09:43 PM ---------- Previous post was at 09:37 PM ----------



And since "this guy" has a hp charger, there's no way on earth a person could have one of a different brand that actually charges faster. How dare I argue this with a guy who knows so much....

---------- Post added at 09:47 PM ---------- Previous post was at 09:43 PM ----------

And here, this was the reason I bought them, from this article.

READ!

t-mobiles-new-charger-line-is-surprisingly-interesting-fast-e/

"and all of them promise to charge your handset 20 to 50 percent faster than a standard model"

---------- Post added at 09:48 PM ---------- Previous post was at 09:47 PM ----------

Maybe engadget doesn't know about the hp charger guy and they all have defective phones with defective batteries too?

LOL, rapid chargers .... that goes back to the day of NiMh and NiCd batteries. There is no such thing as a rapid charger for a Lithium battery for a cell phone. KABOOM!

You're talking 20-50% (20% or maybe 30% I can agree with) but to charge a 1850mah battery in one hour with 700mah charge rate. NO WAY. THAT was the discussion here. Not "a faster charge, but a ONE HOUR CHARGE for an 1850mah battery" with a charge rate of maybe 700mah. Sorry but you are wrong. Can't happen. Impossible. But I'm sure you've done the impossible. At least you think you did.

By the way, ENGADGET did not test them, they were just regurgitating the press release on that same page (where it says "click here") which says "at least 20% faster and up to 50% faster. That's all Engadget does, it rewrites the press releases.

Even 50% faster would still be close to 2 hours on this device. 1hr. Sorry, didn't happen and never will. I'd have to see controlled testing to believe that, like what was done on the ATT Infuse and ATT Galaxy S2 which proves the charging current limitation built into the phone.
But I forgot, you plugged it in and it took an hour. That's all we need.

I can tell you are getting frustrated because you are starting with the ad hominem attacks rather than using any real facts to make your point. Trying to talk sense to someone who discards the basic laws of science (electronics) is absurd. I'd rather argue with my wife. It's more satisfying because at least she uses common sense.

We'll leave it with "you win" because obviously that is the only thing that will satisfy you despite the facts and the science. Yes sir, you are right. 1 hour to charge that battery. Excellent! Enjoy your 1hr charger.

LOL you'r welcome Biz

okay guys chill, that's enough discussion about what's right vs what's wrong.

the important thing here is that it works, and that's all that matters.

besides the original topic was about WHERE to purchase those fast charger

^^^ lol! I didn't even read the OP's post!

still anything that can even come close to 1-2 hr full charge would be stellar.

as with most items from DX, take their ratings with a grain of salt. Most are garbage and some will even do damage as they are so poorly built.

I have bought $100's in cheap throw away goods from there. most work, however not for very long, but they did what i needed for a fraction of the local cost. sure i had to wait 3 weeks for shipping, but it was free

question: how do i measure the current draw with a meter? is there an App that shows actual charging rate? I've looked and cant find anything. on iPhones there was "MiWi" which did show actual drain and charging rates.

the best charger however: spare charged batteries. full battery power in 15 seconds

no man, you need a good old school Multimeter for electronics
like this kind http://www.dealextreme.com/p/victor-...1-x-1-5v-66162
(but that is a crappy one) try to find a better one if you can, something decent on the range of $60 to $100
when it comes to that kind of stuff i trust Analog, more than the electronic type

The meter i have. A $600 Fluke actually, but where to put the probes?

Sent from my SGH-T989 using XDA App

Originally Posted by MisterEdF

LOL, rapid chargers .... that goes back to the day of NiMh and NiCd batteries. There is no such thing as a rapid charger for a Lithium battery for a cell phone. KABOOM!

I can tell you are getting frustrated because you are starting with the ad hominem attacks rather than using any real facts to make your point. Trying to talk sense to someone who discards the basic laws of science (electronics) is absurd. I'd rather argue with my wife. It's more satisfying because at least she uses common sense.

You know what I meant about the rapid charger comment. Anything that charges up to 50% faster may as well be called a rapid charger. . .


And common sense and real facts from me using these tells me that they do charge 50% faster as that's the result I get. 50% faster than 3 hours 15 minutes is 1 hour 37 minutes. I never said from 0 to 100 exact. But it can charge from 0 to 100 in less than that I think. Never tried it though cause who depletes batteries to 100%? Not me.

I made my point. These chargers are way faster than three stock ones. Simple as that. I don't care who says otherwise. Until that person has actually used them, then I don't care what their laws of physics says.


____________________
Deebo took your bike too?

Hi there.

Coming from an HTC Desire to a HTC Sensation, I too noticed a significant decrease in charge times when "using my phone". I attribute this to the power consuming dual core and GPU.

I agree with MisterEdF that lithium ions have a definite hard limit to how fast it can be safely charged.

I think what he is missing though is that while the phone is charging, the battery should not be also supplying power to the phone.

I have some theoretical knowledge of basic lithium ion charging circuitry and the charger (almost) always seems to both provide power to the phone as well as charge the battery. According to some schematics that I've read, when an external power source is supplied, the lines from the battery to the phone itself are disconnected and "replaced" with the external power source.

What I think is happening here is that a 2Amp charger manages to provide enough power to the phone itself so that a sufficient amount of current remains to charge the battery in good time.

While I am not certain that the actual traces from the external power source to the phone/battery charger is able to handle 2Amps, your experience would suggest that it does.

Cheers.