hi all,
Will it harm my MDA PRO (battery) if I use a 2000mA car charger instead of a 1000mA?
The voltage of the car chargers are the same.
amps are not something which are forced into a device
a == volt/ohm
you could connect a charger with 200000 Mega amps
and it would not matter
the amps is just a measurement of what can max be drawn out of the charger
If you can the thing to charge with a car charger at all good luck.
I have had a hell of a time trying to find a charger that works here in the US. Wall chargers and via USB charges fine. All the chargers i find for Blackberry, Razor etc that use a 5 pin mini USB connection dont seem to work. Or at least not well..
Related
i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
so, my question is, why is it called "rapid" if it doesn't charge any faster?
and i suppose secondly, is there an actual microUSB charger that will charge the Thunderbolt faster?
they make one for the iphone that will fully charge it in 30 minutes so i know they are out there.
voxigenboy said:
i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
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Maybe you should try this one.
Install the battery monitor widget. Monitor the battery for about 20 minutes while charging. Tell us what the charge current is.
Does the Motorola charger include a cable? If not, you may just have a weak cable. I have seen cheap cables with wire so thin that the charging current is no better then charging off a weak USB port.
My experience has been that the phone typically recognizes car charges as USB charging and uses a different charging profile. My solution to that is use a wall charger through an inverter or a kernel that doesn't use radically different charging profiles for A/C and USB.
loonatik78 said:
My experience has been that the phone typically recognizes car charges as USB charging and uses a different charging profile. My solution to that is use a wall charger through an inverter or a kernel that doesn't use radically different charging profiles for A/C and USB.
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No need for that.
Cut a small piece of aluminum foil. Carefully place it where it shorts the two center conductors in the charger. Plug the USB cable into the charger. Make sure the foil stays in place over the two center conductors.
It is now a high rate charger. (assuming it can put out 1 amp.)
The limiting factor is typically the usb cable itself. Most usb cables can't support the 1amp that is provided to it. Since you used the original usb cable that came with the thunderbolt (that's been "shorted" as mentioned above" ) it will be just as fast as the moto car charger. the 1amp charging rate that the moto charger charges at (i have one) and that the original one charges at are already "rapid". if you plugged a normal usb cable from somewhere else into the other usb car charger, it'd be much much slower
squeakyl said:
The limiting factor is typically the usb cable itself. Most usb cables can't support the 1amp that is provided to it. Since you used the original usb cable that came with the thunderbolt (that's been "shorted" as mentioned above" ) it will be just as fast as the moto car charger. the 1amp charging rate that the moto charger charges at (i have one) and that the original one charges at are already "rapid". if you plugged a normal usb cable from somewhere else into the other usb car charger, it'd be much much slower
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The stock charger is what shorts the connections. The cable is NOT shorted on the two inner pins because they are the data connections used for connecting your phone to a computer.
doodlebro said:
The stock charger is what shorts the connections. The cable is NOT shorted on the two inner pins because they are the data connections used for connecting your phone to a computer.
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To meet the USB charging spec (which the TB uses), the two inner (data) contacts should be shorted with no more that 200 ohms.
But, the cable can also be an issue for rapid charging. The voltage drop for a 1A/5V source, across only .5 M of 28 gauge copper is ~220 mV. If you use a longer cable, there's more voltage drop. The TB likely current limits itself when the voltage drops below a certain threshold. Best to buy 24 gauge USB cables, if you can, especially if getting longer ones (monoprice has them).
voxigenboy said:
i bought that Motorola Rapid Car charger recent and have been using it about a week now. i've noticed that it doesn't seem to charge my Thunderbolt any faster then it did when i was using the Thunderbolt's USB cable with this USB car charger adapter.
so, my question is, why is it called "rapid" if it doesn't charge any faster?
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Click to collapse
I think its a matter of rated output current. BUT on the other side, the phone must be capable of drawing/using that much current. If the adapter is rated for more current than the phone can charge, the "extra" current wont be supplied.
Initially, Moto's standard car chargers output 5V and up to 550ma max (just like a standard PC USB port) so they didn't charge phones all that fast. Moto then came out with chargers that had higher current output, so they were capable of charging the phones "faster" than the original car chargers (but on par with the home/travel/AC chargers) and called them "rapid car chargers"..
Today, the current output on the Moto SPN5400A car charger is 0-950mA, and I've seen it sometimes referred to as "Rapid Car charger."
But as far as I know, Moto no longer makes/sells the lower current car chargers, and their web site only shows one MicroUSB and one MiniUSB car charger for sale, both of which appear to be of the 0-950mA output variety.
voxigenboy said:
and i suppose secondly, is there an actual microUSB charger that will charge the Thunderbolt faster?
they make one for the iphone that will fully charge it in 30 minutes so i know they are out there.
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Just because someone makes such a charger for the iPhone, doesn't mean one must exist for the TB, or other phones, does it? I know the iPad uses a 2A charger. What happens if you connect an iPhone to that? will it charge faster? I guess that depends on if the iPhone is capable of drawing more than 1A to charge it.
I've not seen a "home" or AC charger that can charge the TB any faster than the Stock 1A charger. Does such a thing exist?
A proper car charger with 950mA to 1A output should charge the TB at almost exactly the same rate as the stock 1A wall/AC charger.
And btw, the Moto SPN5400A car charger DOES charge my TB in about the same amount of time that it takes me to charge my TB at home with the stock HTC charger. So while its not "rapid" compared to the stock home/travel/AC charger, its "rapid" compared to PC USB Port charging, or a plain lower current car charger.
KidJoe said:
I've not seen a "home" or AC charger that can charge the TB any faster than the Stock 1A charger. Does such a thing exist?
A proper car charger with 950mA to 1A output should charge the TB at almost exactly the same rate as the stock 1A wall/AC charger.
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I made a charger for my motorcycle. I use it as a GPS, screen on MAX, phone active with marginal signal. And I wanted to actually charge the battery at the same time. I did a lot of experimenting with the Thunderbolt. It would not exceed a pull of about 850ma from the supply, even at 5.5 volts. IMHO, you are wasting time looking for any charger over 1 amp.
Also, even with about 850ma in, not much over 500ma is getting to the battery. So a totally dead battery is still going to take between 2 and 3 hours to charge, no matter what charger you have. And twice that long if the charger looks like a PC USB port.
worwig said:
I made a charger for my motorcycle. I use it as a GPS, screen on MAX, phone active with marginal signal. And I wanted to actually charge the battery at the same time. I did a lot of experimenting with the Thunderbolt. It would not exceed a pull of about 850ma from the supply, even at 5.5 volts. IMHO, you are wasting time looking for any charger over 1 amp.
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I was asking because of the OP's statement about knowing "they must exist" because they are out there for the iPhone.
I'm perfectly happy with my Moto car charger, and how fast it charges my phones.
I am looking for reliable car charger for KF. Any suggestions?
It needs to output 1.8v 1.8amps .. which is more than most car adapters will support.
krelvinaz said:
It needs to output 1.8v .. which is more than most car adapters will support.
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So, no car charging? Even slow? I mean, you can charge with 1A, slow but can do a job?
krelvinaz said:
It needs to output 1.8v .. which is more than most car adapters will support.
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I think you are wrong about the 1.8v, my charger says 5v @ 1.8 amps, which means you could use any usb charger rated at over 1.8 amps.
stomp_442 said:
I think you are wrong about the 1.8v, my charger says 5v @ 1.8 amps, which means you could use any usb charger rated at over 1.8 amps.
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Meant to say 1.8amps not volts. Most car adapters are 1amp or less. Many car lighters (the socket) max out at 1amp. Utility plugs may go higher, but the charger plug you use itself needs to support it.
You are right about the 1amp though, anything over 1amp will cost quite a bit more than the few dollars a 1amp adapter costs . In that case it would be worth looking into seeing if the manufacturer of the Kindle Fire sells a car charger, but I would only use that for trips, there is no way I would leave my KF charging in an unattended automobile.
Your best bet would be to find a car charger with a USB port on it that can support an iPad 2. If it can charge an iPad, it can charge the Kindle. Tons of good options on Amazon.
Charge
Wouldnt any cigarette lighter plug with a USB connection work?
schleppy said:
Your best bet would be to find a car charger with a USB port on it that can support an iPad 2. If it can charge an iPad, it can charge the Kindle. Tons of good options on Amazon.
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I bought the "GTMax Black 2-Port USB Car Charger Adapter 2A" from Amazon, it has two usb slots, one with 1A and the other 2.1A. Works great on my Bionic, have yet to try it w/ the kindle though.
I'm using a 2AMP charger as wel and it charges just fine. Most chargers designed for the IPAD will work well. Just make sure it has a regular USB port on it and not the apple connector
Any USB charger with a micro connector will charge it provided the KF is using less power at the time than the charger is able to provide. It doesn't have to be rated for 1.8 amps. I've used everything from a 0.5 amp Motorola RAZR charger to a 2.0 amp charger and they've all done the job. The only difference was the time required. I can't see why it being a car charger would make any difference either. My T-Mobile 1 amp car charger worked just fine with it.
Most USB chargers will work
Hi,
As others have said, most USB chargers will work. However, there is one exception that I ran into recently and its well documented on the forums here - if your battery gets too flat. e.g. you left it at home when you went away, it will need at least 5V @ 1.6A to actually recharge.
Regards
Has anyone found a 12v car charger that will charge the G3 while it is being used as a satnav or is the drain from the screen just too high?
I've tried a few different cheap unbranded chargers that will slowly charge the phone when not used but they seem to have little effect when used with Google maps.
I am using an Anker dual-port 24W quick charger sold on Amazon. I can confirm that it charges the phone even with the satnav running (it is the first one I found that really works).
It does not fit perfectly my car's cigarette lighter's plug (it moves a bit when plugged), but overall I am very satisfied about it.
i use Belkin 2A car USB charger with Mediabridge cable. charges at 2A no problem
I use one from Monoprice (2 Port USB Car Charger 4.2A - Black) with a USB2 cable and it works.
With a cheep USB cable the phone goes into slow charge mode.
R-
I use a Belkin Micro 5V 1A
It charges 1% every 20 minutes or so while using satnav. So, it at least keeps up.
Hey guys !
I just bought an Galaxy Tab S (8.4) from eBay but it came without any charger/cable.
As it is a Micro USB port, there's no real problem, I have literally tons of usb chargers available.
The problem is that most the chargers/cable I used only charged the battery at a 0.3A rate (measured with an USB voltmeter + battery app).
I know that the original charger was 5.3v 2A. I tried with some powerful 5.0v charger (3.0A/Quickcharger 3.0 compatible from Anker) but no luck so far...
Is there a specific charger/specs know to work well with this pad ?
I'm using this aukey 3.0 compatible wall charger and so far it's charging as expected
How fast does it charge ? I only get 0.3A with this charger, which charges really slow...
0.3A is 300ma i am surprised the battery charges at all at that low rate, My 10.5" draws 1700ma from my third-party chargers according to my usb monitor, I have managed to charge it as low as 1000ma from my notebooks usb port, but you need a charge only cable as a data cable will not charge at all.
John.
Hi all, I'm hoping that someone much smarter here can help me. **My phone is at 50% battery while conducting these tests. I've tried 4 different usb cables and 4 different vehicles and 4 different usb car plugs (1amp, 3amp 2.5amp 30w) my P6P only charges at 800ma but fluctuates wildly from 40ma to 400ma to 250ma to 800ma. I have turned off adaptive battery and the such. no joy. I don't recall this issue with A12. I'd really prefer to not have to factory reset...but......
PS I have no issues with same cables attached to my wall charge station, which charges 5 devices @1.5amp each. My P6P shows a steady 1500ma.
You aren't fast charging unless you have a PPS or PD charger with a Type-C cable. Doesn't matter which DC port or cable you use. Your car's USB ports are not fast.
VELOGK Super Fast Type C Car Charger [73W Turbo], Metal Adaptive 55W 45W PPS/PD&QC3.0 USB C Car Adapter[Super Fast Charging 2.0]for Samsung S22/S21/S20 Ultra/Note 20/10 Plus,iPad Pro/Air,Macbook,Pixel https://a.co/d/glhc0OY
LLStarks said:
You aren't fast charging unless you have a PPS or PD charger with a Type-C cable. Doesn't matter which DC port or cable you use. Your car's USB ports are not fast.
VELOGK Super Fast Type C Car Charger [73W Turbo], Metal Adaptive 55W 45W PPS/PD&QC3.0 USB C Car Adapter[Super Fast Charging 2.0]for Samsung S22/S21/S20 Ultra/Note 20/10 Plus,iPad Pro/Air,Macbook,Pixel https://a.co/d/glhc0OY
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I'm not talking about fast charging. I just need to get the 1.5amps I was getting before with the same setup as I was getting on A12 This is the charger I just bought hoping it would fix the sub 1amp charge rate I'm getting, Without getting 1 amp rate, my phone looses power while driving and using maps and such apps. This was not an issue with A12
Amps don't matter when you're still stuck at 5V.
It should work though. No point in buying a charger with only USB-A.
I had this issue Android 13 until Sept update even with USBC PD PPS 65W charger, phone was draining using maps. now no.
Also I do not believe that Pixel phone supports QC for quick charge so you might be lucky to get 1amp charging from USB A