yashsingh1/xdaforums huggingface dataset:
[Motorola Droid 3] clockworkengine:
I have some issues with my D3 hardware keyboard. It pertains to simultaneous keypresses. I found a great setup for the keyboard for emulators and for the most part it works fine. The phone can handle simultaneous keypresses all day, as long as you press the second button while already holding the first. If you press them both at the exact same time, neither will register at all. It screws me up big time when I need to make diagonal movements suddenly, which is a pretty common scenario in console gaming. Can anyone suggest a solution to the problem or possibly explain why I am having these issues?

I am mapping the dpad to the alt, voice command, shift, and z keys, and i the action buttons are generally mapped to the arrow keys and surrounding buttons. When playing I bring the slider down over the first second and third rows of keys so I don't ever have to look at the keyboard.
[HTC EVO 3D] billyapd21:
Hey guys I'm looking for a car charger that will charge the phone while running google navigation. The current one I have cannot keep up. Basically the phone is using more battery than the charger is supplying so eventually even though it's charging it will die. :mad: Please help with some suggestions.
[HTC EVO 3D] harolds:
The higher the output amps the better, most online don't say.

This one has a 1A (1000 mA) which is the highest I've seen until now.

http://www.cellphoneshop.net/2usbcar.html

This says 2.1A.

http://www.amazon.com/dp/B004U4RF7I...e=asn&creative=395093&creativeASIN=B004U4RF7I

Here's one that has 1 of each (1A & 2.1A):

http://www.scosche.com/consumer-tech/product/1921

You need to be careful about using one too high for the phone as well.
[HTC EVO 3D] nejohnson:
The output of the wall charger that comes with the phone is 1A. Find an USB car charger that outputs 1A and you should be fine.
[HTC EVO 3D] Wiley_11:
This will run Pandora&Navigation at the same time and still charge,but not by much. But a least it doesn't discharge.

*LINK*
[HTC EVO 3D] runcool:
The phones are only meant to charge up so fast. once you attempt to go over that limit, you risk causing damage to your phone. don't look for something with so much power it charges it in 20 minutes. it will kill the phone and battery.
[HTC EVO 3D] mozman:
Is 2.1A safe from charging phones?

Sent from my EVO 3D
[HTC EVO 3D] Impulses:
I doubt the phone will charge any faster even if you get a 2A charger, but there are many chargers that only charge the phone half as fast as you possibly could. Some chargers only provide 0.5A (500mA, conforming to the PC USB spec) and some 1A chargers will only provide 0.5A because of the pin out on the connector plug... You can tell this is happening if under battery stats in settings it says it's charging from USB instead of AC. You could short some pins on said chargers to fix that but it's usually easier to find a proper one for $3 or whatever.

Even if you have a 1A charger you could manage to discharge faster than it charges if you're streaming music while using navigation for a while and/or you happen to be in a low signal area (which eats battery like crazy since the radio goes wild trying to find a better signal/tower).
[HTC EVO 3D] DZLRULZ:
I have the one in the link below. It is OEM HTC for the Thunderbolt, and has

2x 1A Ports. It keeps up with

Pandora and GMaps. My old charger would not (it was 500mA.) The cool thing is that both ports are 1A in a small form factor, and it has a white LED that illuminates them. It comes with a coiled cord which is well built.

http://www.amazon.com/gp/aw/d/B003OQUJRQ/ref=redir_mdp_mobile

Swyped using 2 cores and 3 Ds
[HTC EVO 3D] wrxlvr:
I have the Motorola one, and it keeps up, and charges fast.

This one:

http://www.amazon.com/gp/product/B000S5Q9CA
[HTC EVO 3D] happyhallsy8:
my tom tom universal one is the only one that ive found to come out at exactly 1A - 1.2A measured via current widget...

All the other brand 1A's sit at 350 - 600ma

I get about 0 - 150ma normal with Google Navigation and Power Amp playing flacs

I get about 500 - 780ma with Tom Tom with Google Navigation and Power Amp playing flacs
[HTC EVO 3D] tgruendler:
Check out this thread from the OG EVO Accessories. Good info on car chargers:

http://xdaforums.com/showthread.php?t=861055&highlight=car+chargers

I have this:

Monoprice.com Car Charger (Cigarette Lighter to USB Female Converter) #6766, 1000mA

and a cheap 3 foot USB cable from Monoprice also and it will charge while on 4G, Google Navigation and Pandora playing
[HTC EVO 3D] stopeject:
You have no idea what you are talking about. The rating indicates the maximum current the charger is capable of. The phone will decide how much to draw.

Actually, the high rating is not enough. The charger should have a certain circuitry ( a resistor between data pins) to "tell" phone that it can supply higher current. 2.1A iPad charger doesn't have it because it was designed to communicate with iGadgets. It will act like a regular 500mA charger when connected to an Android phone.
[HTC EVO 3D] ChrisDos:
A lot of the 1amp chargers that you see will still only charge your phone at 500ma. Unless USB pins 2 and 3 are shorted together (or have less then 200 ohms between pins 2 and 3), the phone will think it's connecting to a computer and only draw 500ma. I modified a few 1amp chargers to actually charge at 1amp instead of 500ma. See this thread:

http://xdaforums.com/showthread.php?t=767961
[HTC EVO 3D] P0ll0L0c0:
Are you SURE you're getting the right result with the Current Widget? There's been quite a few threads on this topic and it doesn't seem that the Current Widget correctly supports our phone. Per that widget, I'm getting 400ma current draw normally - without running any active apps. When I use various chargers, that number goes up or down seemingly at random, LOL.

My most powerful charger, which provides 2A on one port and 2.1 A on the other - makes the widget report only 35 mA.

In short - I wish there was an app that correctly measures current draw on our phone, but I haven't found one based on multiple threads on the topic.
[HTC EVO 3D] stopeject:
I use Battery Monitor Widget. I definitely see the difference between 500mA and 1A chargers. Some current form the charger is consumed by the phone itself, so it is not possible measure the actual draw from the power supply without an external meter.
[HTC EVO 3D] jinwu57:
Get the Amazon one. Trust me! I have one and all my buddies have them. It is by far the cheapest and most powerful charger you can find.

My buddy did a review of it on here:

http://randomtek.com/randomtek-com-best-motorola-rapid-car-charger/
[HTC EVO 3D] pinky059:
I have the one from Sprint with the AC adapter in it that pops out and it works well. Granted it was a bit pricey, but, it does the job and the battery does in fact charge while using telenav navigation and listening to music through the stereo as well. Slowly, but, at least it doesn't discharge while being charged....LOL...
[HTC EVO 3D] stanglifemike:
I've seen/ heard a LOT of people who have that one and love it! Good choice with that one. I have a Motorola that also has a USB port in it and i little slide cover for the usb port when you're not using it, works great! I love it an highly recommend it. I charge my 3D and 4th Gen iPod Touch with it at the same time.
[HTC EVO 3D] Wiley_11:
This is one of the few chargers that would power the Palm Touchstone reliably. There was an extensive thread at Pre Central on car chargers. Just make sure it's the SPN5400A like in the link above. Some other Motorola chargers have a lower output.

On the E3D it shows charging on AC. :D
[HTC EVO 3D] P0ll0L0c0:
If you have a high amp (1+) charger that is not charging your Evo 3D above a USB connection, just replacing the cable will help you maximize your speed. I figured this out when I bought a New Trent Arcadia battery pack and was disappointed when I used my regular data cable, and was limited to 500 milli amp charging. But then I thought to use the included cable - and all of a sudden my phone registered as being charged through AC. The charge rate doubled.

I've since tried that cable with an Ipad mini car chager - and it boosted my charging rate there too. The issue is that if the middle two pins on the USB cable aren't bridged (shorted) - then the phone registers a USB connection and limits charging. Rather than get a special charge-only cable, you can bridge the middle two pins on the large usb side of a cable. I've read that people use a short wire glued in place, or even taped, to accomplish this.

That said - I recently ordered this retractable cable to use in my car. I haven't gotten it yet - but I'm pretty sure it'll register as AC charging when connected to my phone:

http://www.amazon.com/gp/product/B004MDOHJG

I'll report back when I get it. I went through this exercise, because I wanted a high capacity mini charger that barely sticks out of my car's socket - and none seemed to work right with the Evo 3D. But the cable that came with the new trent worked great with a mini charger I already have.
[HTC EVO 3D] PTown599:
Monoprice pID 6152. Works great for me.
[HTC EVO 3D] corybrubaker:
get a rockfish car charger i have had mine since my evo 4g and it works better than any other charger i have had i can get 15-20% in the drive to work and that only like a 15 min drive maybe less and i have had no issues with it at all i don't know all the stats on it but it works great
[HTC EVO 3D] ausch30:
I have a PointMobl charger from Radio Shack I bought when I got my OG EVO. Charges at 1A, works great.
[HTC EVO 3D] bitslizer:
Its not just a USB vs AC issue, cheap bad quality cable also limit charge rate. I was using a startech right angle micro USB 6 ft cable and it just couldn't keep up when I have 4G and Pandora and GPS on battery slowly drain overtime even plugged in, even though I was using a good car charger, switching to the nicer OEM cable from HTC and Nokia i have would actually allow me to charge the battery while using all of the above.
[HTC EVO 3D] Impulses:
Interesting, I use a couple cheap cables all the time (including the one you mentioned, and a flat retractable) and I've never noticed that... But there's no 4G here and I rarely stream while using GPS save for the rare roadtrip, so I guess I rarely encounter the worst case scenarios. Is there a good way to empirically test charge rate with different cables?
[HTC EVO 3D] P0ll0L0c0:
I REALLY doubt that there's a difference in cheap cables versus expensive ones. And none of my tests suggest that. I've gone back and forth with a lot of cables. I bet if bitslizer use Battery Monitor Widget - he'd note that the cables he was using were limited to "USB plugged".

I can since confirm that the retracting Bestek cable I linked to - will allow us to charge as if from AC.

To run tests, I've used a variety of widgets - and Battery Monitor Widget appears to be the best. When you click on the widget itself, at the top you'll see whether you're USB or AC plugged. You can measure the charge rate by first seeing what the discharge rate is, then adding the charge rate AFTER the fact. For example, right now my phone was discharging at -175 ma or so, and +275 ma after plugging into a USB source for a delta of about 450 ma.

I've noticed zero difference between cheap and expensive cables, but a big difference between USB cables and charge-only cables. The best charge rate I've gotten is about +900 ma, any charger at or above 1A seems to work equally on this phone. The limit seems to be 1A charging regardless.
[HTC EVO 3D] Impulses:
You're probably right, I just tested the very same right angle Startech cable that he was complaining about and I was seeing about +750mA after plugging it into the stock HTC charger, anywhere between -180mA and -250mA before being plugged in. That adds up to right near the max charging rate of 1A. Using a cheap flat retractable cable I got I was seeing +800mA, so that one did a bit better (possibly because it's partially coiled?), but it's a small difference (I did swap between them a few times and kept seeing the same).

Screen was on as I did this and I've got some stuff open, so I imagine the 200mA-ish drain is normal under those circumstances.

My guess is he was either not using a 1A charger, or it's a 1A charger that doesn't have the proper pins shorted out so it acts as a USB port with any regular USB cable, thus delivering only 500mA or 0.5A (and reporting "USB charging" under battery stats, as you said, rather than AC). Those chargers are way more common than "charge-only" cables with the pins shorted out within the cable. Lots of cheap (and not so cheap) car chargers will only do 500mA even if rated for 1A, you can solve that by shorting two pins or using a cable that has them shorted.

Any regular USB cable will allow you to charge at 1A provided you're using a proper charger tho, like the stock HTC one which can be found fairly cheap on Ebay...

I bought an extra one when I had the EVO 4G to avoid the hassle of finding another proper 1A charger, and because it's fairly small anyway. Got three of them now that I got the EVO 3D, and my Transformer's charger works fine too. I do need to short out the pins on a Philips USB car charger I got tho, it's a 1A but it'll only do 500mA... I don't use it much tho, usually I plug into a Kensington Bluetooth kit in my car and I don't wanna bother opening that thing up... Not even sure it's rated for 1A and it might not work right afterwards if I go messing around inside it.
[HTC EVO 3D] bitslizer:
I do have battery monitor widget and it DOES show AC charging and also the charge current.

FYI

I even tried charging at home using my TRUE 2Amp AC OEM charger for my HP TouchPad and got same result. Namely, the OEM HTC/Nokia cables give higher charge current than the 6ft startech.

4 different chargers, 2x 1A car charger, a HTC OEM charger, and a HP TouchPad OEM 2Amp charger, all same result.

Another poster say he have same cable and don't have the same issue I do, so who know, maybe I got a bad cable?

I'm not advocating super expensive $20 cable. I'm just saying the OEM HTC and Nokia cable I have give me consisitently repeatable higher charge rate than the 6 ft startech right angle Micro USB cable, and I'm not saying ALL cheap cables are bad either, mostly this will be case by case, but I'm just saying don't automatically blame the charger being bad and can't supply high current, just try swapping the charge cable to see if it make a difference.

What give you guys the impression it would be under USB charging? HTC and Nokia OEM cable are data cable by default, IE the data pin are NOT short, so logically if I'm on USB charging with the startech cable, I would also be on USB charging with the OEM HTC and Nokia cable. OK assume i'm a dufus and was on USB charging, and USB charging for all cable since they are all normal data cable, if I'm still getting better charge rate with the OEM HTC / Nokia cable than the StarTech cable that STILL say the startech is not as good as the HTC / Nokia, so that's back to what I said earlier, either this particular StarTech cable I got is a bad one, or the design (wire gauge) of this style of startech cable limit the charge current, Its not something I can test for unless I go and buy a couple more of this cable.
[HTC EVO 3D] Impulses:
Mine is 3 feet, that could factor into it I guess... I've got two and both behave the same even when plugged into longer USB extensions tho. Maybe yours got bent and partially damaged, they are pretty flimsy indeed, wouldn't surprise me if the could splinter internally.

What was the mA difference in charge rate btw?
[HTC EVO 3D] bitslizer:
Yes, length does play a factor, Somebody posted a link very technical white paper on that topic on XDA before, but I can't seem to find it again. basically Longer it is the more resistance, which causes more voltage drop amount other things. but I think its the cable's construction/quality/defect that's a bigger factor

I did a little more digging

Broke out the multi meter and measured my 6 ft startech right angle cable, FYI the Cable is "thinner" (ie smaller diameter) than the OEM Nokia/HTC cable, smaller diameter cable have more resistance.

I measured the resistance of the 6ft startech Power Vcc pins and discovered it is almost exactly 2 Ohm. I would be very interest to see what your 3ft cable measure at. For comparison my OEM Nokia 3.5ft cable only measure 0.5 Ohm

Breaking out high school physics.... Voltage drop = Resistance x Current

2 Ohm x 1 amp = 2v in voltage drop that's big enough to affect charge rate. Feel free to check my math, I'm rusty.

difference in charge rate, using the same charger (Griffin powerjolt Dual USB micro charger, both port rated for 1amp supposedly) is about 300mA, with the startech not quite breaking even, and the OEM nokia i'm using in my car averaging 300mA+

I can get 500mA+ on the Nokia with a different better but much bulkier charger (actually an Arkon universal charging dock), but as I'm using the iGrip dock now with the Evo 3D, i don't use the Arkon dock anymore
[HTC EVO 3D] Impulses:
That's your measured charge rate while actually using GPS etc or with the phone idle?
[HTC EVO 3D] bitslizer:
full usage

4G on, Screen Bright 100%, pandora streaming, GPS google map, bluetooth on, but wifi is OFF
[HTC EVO 3D] Impulses:
Gotcha, I'll give mine a try later while streaming and using GPS, I can't imagine three feet add that much extra resistance but I dunno. I did notice a difference of 50mA between the cables I tested, as I mentioned before, maybe that's just enough to allow the phone to sustain a charge during your scenario vs slowly deplete. Although I think you said the difference between the cables was actually a whole 300mA for you? Hmm...

If one of the chargers you're using is giving you a whole 200mA more than the other I'd say the biggest thing holding you back is still the charger tho, since the phone's never gonna charger any faster than 1A (- minus whatever load you're putting on it).
[HTC EVO 3D] bitslizer:
6ft vs 3ft = 2x the resistance assuming same construction and no defect.

for me, as long as i can run everything while in the car and not deplete the battery that's the baseline minimum need. Anything above that is just gravy.

Having the high output of the good charger is nice, but its also bulky and I don't have anywhere to put it other than the cup holder and that look very messy, vs the Griffin micro charger, its flush mount to the 12v socket so its barely noticeable, for me look very nice and slim profile. I can accept the lower output since it still can charge my phone, its definitely a personal choice though.

but like I've been trying to point out, sometime its not necessiarly just the charger causing a slow charge or even depleting the battery, the Cable can be the culprit too!
[HTC EVO 3D] Impulses:
Well you're right... And current = voltage / resistance (I = V/R). If voltage is 5V, then a 2 ohm resistance should still easily allow the cable to deliver 1A no? (up to 2.5A) I'm confused now...
[HTC EVO 3D] bitslizer:
The catch is you are only feeding 1amp at the input...you can't get 2.5A because you are only inputting 1A

Ohm law which i'm very very rusty on, you pick 2 input variable to get the other 2

I = Amp, R = Resistance, V = Voltage, P = Watt

Deciding which to use is always tricky.

I think if you feed the equation a voltage, that's actually how much you want the voltage to drop Across the resistor (treat the USB cable as a resistor).

http://www.doctronics.co.uk/resistor.htm#limit

Voltage differential, along with Amp is what charge the battery.

Think of Voltage as in... Compress Gas.. PSI... always flow from High to Low you can't have a low voltage source charge something that's higher voltage (without a voltage converter of some sort anyway). Too much Vdrop (as cause by high resistance in the cable), you may end up draining your battery instead.
[HTC EVO 3D] Impulses:
I know you're only gonna get a max of 1A charging, what I'm saying is that the cable should easily be able to deliver it. All USB chargers are 5V. 5V with a 2 ohm resistance is over 1 amp, so if the charger is delivering 1A at 5V there shouldn't be a reason a cable with a 2 ohm resistance can't deliver it, unless I'm missing something, which is very probable. :p
[HTC EVO 3D] bitslizer:
http://en.wikipedia.org/wiki/Volt#Water_flow_analogy

width of the pipe = resistance

you have a small pipe (which also causes pressure drop), with insufficient pressure, you aren't going to get a fast flow through a small pipe
[HTC EVO 3D] Impulses:
Huh? Length, area and resistivity of the material all factor into resistance, yes, but you already established the came has a 2 ohm resistance did you not? ( R = ( resistivity (L) ) / A IIRC )
[HTC EVO 3D] bitslizer:
the resistance caused the Voltage from source to device to drop, without sufficient Voltage, you won't get a fast flow / Amp

at least that's how I'm understanding the situation, your 2.5amp is applicable from 5v source to 0v device, but Li-Ion battery go from about 3.3v near depleted to 4.2 volt fully charge, if say the battery is at 4volt, 5v-4v = 1v

V= IxR or V/R = I

1 V / 2 Ohm = 0.5 A or not enough to keep up

this didn't even take voltage drop into account which would make this even worse, as after Vdrop you are now at less than 1V

USB spec call for min of 4.8V at the source socket. that can even lower the rate a bit more, lastly, not all charger are created the same, maybe some charger are providing less voltage also?

so many variable comes into play
[HTC EVO 3D] Impulses:
If a charger is providing significantly less than 5V then it's not created differently, it's faulty and not consultant conforming to spec... 2 ohm vs 0.2 ohm between the two cables sounds like a lot btw, did you happen to test any other cables?

Edit: I just tested my right angle cable. While unplugged, with TeleNav running and the GPS icon up, screen at full brightness, and Amazon cloud player streaming I was getting just over 600mA draw (-600 mA in Battery Monitor Widget, I wish this thing was able to poll quicker), with spikes near -800 mA... Once plugged in I was between +250mA and +370mA (seems to have stabilized at +350). Frankly I think your cable's just busted or the charger isn't doing a full 1A to begin with. /shrug

Length alone doesn't explain it, if these cables' innate resistance was great enough that length mattered that much then everyone would be using super short cables to decrease charge time... And manufactures would be shipping three ft cables. :p I've got poorer wind-up cables that match this one and they're even thinner. I doubt the batterie's operating voltage has anything to do with it either, the phone's own circuitry sits in between charger and battery.

---------- Post added at 08:00 PM ---------- Previous post was at 07:59 PM ----------

Screen brightness makes a huge difference btw, if you don't need it at 100% to see it in the car then it's just an excessive power draw... I'm just talking in general here, not suggesting it as any sort of solution. I started using manual brightness when I switched from the EVO 4G to the 3D because it seemed to me like the 3D was needlessly adjusting it up/down way too often and it tended to run too bright in general, which was mildly disappointing...

I'd much rather have proper auto brightness and never have to fuss with it, but outdoors is the only place I find myself raising it anyway (from 30% or whatever it's usually at).
[HTC EVO 3D] Wiley_11:
Here's a handy voltage drop calculator.

http://www.altronix.com/app_notes/calc.php

Using a 1amp current and 22guage wire. Anything less than 4%VD is acceptable or you increase the wire size.

3'-4.9V=2%VD

6'-4.8V=4%VD

20'-4.33V=13.4%VD

50'-3.31V=33.8%VD
[HTC EVO 3D] AzumaShinobiryu:
i got a hitfar universal car charger but it doesn't have any info on the box. I noticed that my evo 3d heated up quite a bit though, is it supposed to do that? When I charge at home on a wall outlet, that does not happen.

Thanks.