Database Develop

USB Cigarette lighter chager

I have an old usb cigarette charger - output is 5.5V 500mA. Will this be okay to use with X1 or should I buy an official one?

My 650mAmp charger does it well enough, yours will probably too.

it is the same voltage as usb port so it should work

5.5V or 5.0V?

I use the blackberry lighter charger, 5.0 v 1A
Is it OK ???
I think I got the answer http://forum.xda-developers.com/archive/index.php/t-505222.html

volts is the only thing that matters amps are drawn and a device will draw as much as it's made to be able to the more it can draw the faster it can charge
usb is spc'd to be 5volts but would think that 5.5volt would not cause problems but
once I gave my ext usb hub 12volts and it killed it and many of the devices connected to it

So, using a 5V 500mA just to keep my X1 alive while navigating should be no problem, right? I hardly believe it'll need more.

I use the car charger from my navigation pocket loox by Fujitsu Siemens.
This works great with output 5 V 1 A.
The original charger for home has only just output 5 V and 700 mA.

i never use my sony charger because its not charging properly
i always use motorola charging because its micro usb charger the same as X1. no problem so far

Alternative 5V chargers (currency?)

Hi, I'm really a noob when it comes to electronics. For all I know, when a cable fits it should work
I have a couple of microUSB chargers laying around. They all have an output of 5 Volt but they output a currency that differs from the standard charger (1A).
What is the "golden rule" wrt currency? Are chargers with a currency that is less than 1A save?

current is not pushed, it is pulled by your device as necessary. voltage is pushed, so correct voltage,5V in this case, is very important. As for the current, if the charger can't supply enough current with that voltage it will get hot and cause problems. i.e., you should have a current greater or equal to your original charger and same voltage. this applies to ALL of your electronics.

ozkaya said:
current is not pushed, it is pulled by your device as necessary. voltage is pushed, so correct voltage,5V in this case, is very important. As for the current, if the charger can't supply enough current with that voltage it will get hot and cause problems. i.e., you should have a current greater or equal to your original charger and same voltage. this applies to ALL of your electronics.
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Thank you very much for this explanation. What do you think, a 5v charger with a current of 850mA will that cause big problems when I use it just accidentally to charge my device.

appelflap said:
Thank you very much for this explanation. What do you think, a 5v charger with a current of 850mA will that cause big problems when I use it just accidentally to charge my device.
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It probably wouldn't be a lot of problems, if you really have to do it, charge it when the screen is turned off, so that you will need less current.

You can charge without risk with any USB charger. Unless the charger "signals" that it can supply more than 500mA by having the 2 USB data pins shorted, the HD2 won't pull more than 500mA, which is the minimum a USB charger must be able to supply.

"Golden rule" - If You have 5V its safe for Your phone, current level is determining the time that You need to charge battery.
Kilrah sad that HD2 'pull' no more than 500 mA - ok, if this is true ( i believe it is , he always make some test for it ) original charger needs about 2h, with 250 mA charger it will take more than twice of that time - 4h ( it's not fully linear )
@Kilrah - did You test what's power ( current taken ) consumption during charging ? it's really only 500 mA ? if so, than why HTC use 1A charger ? usually safety rules are about 15 - 30% more than max current needed.
0.5 A + 30% = 0.65A , so why 1A ?

The minimum current what HD2 accepts is 500mA because this is the USB standart.
If the supply could deliver more than 500mA the HD2 will take it up to 1000mA. The maximum current which the HD2 can use is 1A (1000mA).
So if your charger can deliver 5V and 2000mA the HD2 will limit the current to 1000mA. So you can use a charger, when the voltage is 5V and the current at least 500mA.
The push pull principe in the post before is correct, because the charger is a voltage source and not a current source.

I am already enjoying the benefits of proposed standardisation of phone chargers to micro usb pin. Since I upgraded with HD2 from Nokia N97 I am using the nokia wall chargers as well as well as car charger. I didnt have to buy new charging accessories for this mighty HD2.
By the way would the Nokia data cables (micro usb) be able to sync data when used with HD2. Havent tried yet.....

afropolak said:
@Kilrah - did You test what's power ( current taken ) consumption during charging ? it's really only 500 mA ? if so, than why HTC use 1A charger ?
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As said, IF the 2 USB data pins are NOT shorted (that's how it is by default on <500mA/3rd party chargers, or on a PC), the HD2 will limit the current it pulls to ~450mA.
IF they are shorted (on chargers that support higher current like the supplied one) the HD2 will pull more. With the supplied charger it's about 850mA, with a 3rd party "800mA" Chinese charger that didn't have the pins shorted but was modded to have it done, it pulls about 650mA.
PlayStation said:
By the way would the Nokia data cables (micro usb) be able to sync data when used with HD2. Havent tried yet.....
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Micro USB is a standard, so every micro USB cable should be the same. If not, you've got a botched knockoff.

so how do you short the cable assuming I get a car charger without a USB to micro USB cable and sourced my own cable from a parts bin that was probably for computer usage?

cheahcl said:
so how do you short the cable assuming I get a car charger without a USB to micro USB cable and sourced my own cable from a parts bin that was probably for computer usage?
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I don't think that would be a good move!
You would have to be certain of the regulation circuitry of the charger and it's ability to cope with the attendant initial draw of the battery when plugged in.
This will depend on the state of drain of the battery and the various functions in operation at the time on the phone.
At the moment of plugging in is when the draw will be highest and when any protection circuitry will be essential.
A well topped up battery will "draw" less than a depleted one and will continue charging on as little as 350mAh (again depending on what is running on the phone).
A very depleted battery may well not even start the charging process at such a level. That's why the HD2 comes with a 1000mAh wall charger!
The levels quoted for PC/Laptop USB power are nominal off load levels and will vary depending on any othe devices plugged in on the same bus supply.
So, with a PC that has a few attached USB devices, you may well NOT see 500mAh and as has been reported before, you can get battery depletion back into the USB port as other devices draw from the phone!
Always best to keep the battery topped up to prevent "charging strain" on the cells. This will maximise the capacity available when you need it for those longer periods of time.

[Q] Compatibility with car charger on 1.5A and 5V

Hi,
a friend of mine have gifted to me a car charger that is incompatible with my Legend, because is miniusb (with output: 5V - 1.5A) and the regular charger in bundle with the phone is microusb with output: 5V - 1A.
Can I use the car charger, with a differte cable (the car charger can use usb cables), or the current in output is to much for the phone?

It doesn't actually matter how powerful the PSU (power source unit) is, even if it was 5V / 10A you could still use it... To put it to easy talk, the phone will just take what it needs. The important parameter is Voltage, which is OK - 5V

Dr.Romca said:
It doesn't actually matter how powerful the PSU (power source unit) is, even if it was 5V / 10A you could still use it...
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That's not quite true. The power does matter, but only in a limited way. The voltage (volts) must match. The current (amps) or power (watts) rating of the supply must be at least that which the device draws.
So in this case; yes, you are absolutely fine. You just need an adaptor to make the plug fit.
My work phone has a mini-USB socket, but requires 1.5A to charge successfully, which is three times as much as standard USB. My personal phone has the same socket, but will charge when connected to a conventional USB host like a laptop, which only supplies up to 0.5A. I can use any USB charger with my own phone, but I can only charge my work phone from its own charger.
Apparently I've not made enough posts to include links, but you can google "Charging Batteries Using USB Power - Maxim" and click on the first link, as long as you don't mind reading a moderately technical document.

Don't nitpick I'm an engineer so I know how these things work end to end, If you have power and a good charger (not meaning the car charger, but the actual charging circuit handling the battery charging inside the phone) you can charge even from 5V / 200mA It'll just take more time, of course you'd have to add more than the phone consumpts, but if you do that you're basically OK...
What you're referring to is USB charging, we all know USB doesn't have to have full 5V but in case of charger, there will be 5V...(possibly even more when open)

I have this car charger with 5V and 1000mAh
http://www.ansmann.de/cms/de/consumroot/chargers-and-power-supplies/universal-chargers/carcharger-micro-usb.html
and i must say it is worse than the Original charger for the Wall outlet from HTC -- it takes about twice as long to charge the phone.
And when i use my phone for Navigation it even slowly discharges the phone - which is truly annoying!
EDIT:
I did some research: on original HTC Chargers the Data+ and Data- pins on the micro-USB-connector are short-circuited to tell the HTC-Phone that it connected to an original charger - only when the phone realizes this, it charges with 1000mA!!! Otherwise it only charges with the USB-specificated 500mA
You can easily check this when you charge your Phone with a 3rd-Party charger, go to:
Settings-> Telephone-Status -> Battery
Here is usually written charging (USB)
only with original chargers you get "charging" (AC)
I opened the connector of my Car-charger and short-circuited the Data+ and Data- --> Now it says charging (AC)
I still have to test if charges faster now, and charges the phone while navigation - because until now it discharges while navigation, despite being connected to the Car-charger.
So to say it short: If you want to quickly charge your phone in your car buy a original HTC Car charger, or short-circuit a 3rd-Party one.

f4b1ck said:
Hi,
a friend of mine have gifted to me a car charger that is incompatible with my Legend, because is miniusb (with output: 5V - 1.5A) and the regular charger in bundle with the phone is microusb with output: 5V - 1A.
Can I use the car charger, with a differte cable (the car charger can use usb cables), or the current in output is to much for the phone?
Click to expand...
Click to collapse
don't worry you can charge your phone with no problem
i have the same 5V 1.2 A ,it's charging with no problem

It's good to have stornger charger. Probably you wil be able to charge your phone faster But it always have to be 5V.

In-car charging

Need some help please.
When running Copilot, I'm unable to charge my Xperia Z faster than the battery is discharging. I've tried a variety of cables and chargers, including the official Sony charger and a 3rd party charger that puts out 2.3 amps. Nothing seems to make a difference.
It will charge (slowly) from a USB port on my PC while Copilot is running.
When plugged into a charger in either of the 12V outlets of my car, the phone correctly shows as charging over AC, and it does discharge at a lower rate, so it's as though it isn't pulling enough current.
Any ideas?

[Q] DK31 Dock charging time?

I want to buy the dock charger for my Z1 but there is no information about the exact charging time.i heard its 3000mAh @5v but because the dock only has a usb connector it means you have to connect it to the AC charger .and the AC charger is 1500mAh.
so if anyone can tell me the exact charging time on magnetic dock i would be so glad!

NiM72NiK said:
I want to buy the dock charger for my Z1 but there is no information about the exact charging time.i heard its 3000mAh @5v but because the dock only has a usb connector it means you have to connect it to the AC charger .and the AC charger is 1500mAh.
so if anyone can tell me the exact charging time on magnetic dock i would be so glad!
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The dock has to plug into a wall plug for it to be used effectively. The wall plug determines how much mAh the phone will be charging at. 3000 i think is over the limit the phone can safely charge at...
I use a 2000mAh charger with my Z1 and the dock is connected to the stock sony 1500mAh wall plug and ive noticed its only slightly slower.

Avantiel said:
The dock has to plug into a wall plug for it to be used effectively. The wall plug determines how much mAh the phone will be charging at. 3000 i think is over the limit the phone can safely charge at...
I use a 2000mAh charger with my Z1 and the dock is connected to the stock sony 1500mAh wall plug and ive noticed its only slightly slower.
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so you mean that it can charge by 3000mAh when its connected to the wall plug directly.is there any way to connect it to the wall plug directly? i mean is there any kind of USB to ac kit that doesnt limit the current ? because if we connect it to a charger(like the z1 1500mAh) it will be limited to charge the device at 1500mAh.so is there a direct kit or a 3000mAh charger should be used to charge it