yashsingh1/xdaforums huggingface dataset:
[Eee Pad Transformer Accessories] :
I've had good luck with this company and found this in a search for a solution. Haven't bought the TF300T yet but needed to know I had a pwr solution for my vehicle as this will also be my GPS and Media Center.

@ amazon dot com /Adapter-Charger-Transformer-04g26e000101-Touchscreen/dp/B007Q4WMSG/ref=pd_sim_pc_10

PWR+ Extra Long 5.5 Ft Cord Car Charger for Asus Eee Pad Transformer Tf101 A1 B1 Tf101g ; Transformer Prime Tf201 & Tf300t ; Eee Pad Slider Sl101 A1 B1 ; P/n 04g26e000101 Tablet Touchscreen Tab Power Supply Auto Dc Adapter

Warranty: 30 Days Money Back Guarantee / 1 Year - Free Exchange

Cheers

.
[Eee Pad Transformer Accessories] darkprince-2:
hello wanted to share me experince with community

i got a charger connected female usb2 to it directly and set it to 14+- volt it has 2 amps max

working like a charm with device get so little heat didnt notice if original was also make heat or not

charging is fast somewhat not bad

and noticed little freezing (screen does not respond sometimes in some places i touch or complete freeze just pushing button to get to sleep and push again to wake = fix and might occur again)

---------------------------------------------------------------------------------------

Q:will this DIY charger thing decrease battery or device life span or do any damage in long or short term
[Eee Pad Transformer Accessories] thomas_pieps:
Yes you are pushing the internal capacitors to or over their limit. So yup it will decrease the life span but unknown how much
[Eee Pad Transformer Accessories] joeyman08:
I don't know if their is a way but can I charge my tablet while having a hard drive plugged in via otg

connector

Tf300t cm10
[Eee Pad Transformer Accessories] xda.glawion.de:
don't dry it. I think it would burn your hardisk if you charge at 15 V. A really chance could by to charge with 5 V 2 A but in this case you have to switch off the tablet an it will take a long time.

correct me if i false
[Eee Pad Transformer Accessories] wotlos:
Anker Astro3E battery pack

Ok, well thos might very well be a stupid question but i purchased an Anker astro 3e 10000 mah battery pack off amazon http://www.amazon.com/gp/product/B009USAJCC/ref=oh_details_o00_s00_i00

Now the description says it charges such devices as the ipad and ipad mini with up to 5v at 3a, however im looking to charge my TF700. Will this work? Is the amperage too high even at 5v? Am I making no sense at all, lol?

I eead throu about 29 pages of this thread and really couldnt find a definitive answer so please, anything will help. Thanks.
[Eee Pad Transformer Accessories] opsguy:
I don't believe that one will work because it only has a 5V output. You need one with with 11 to 12V output like this one at Amazon

Anker Multi Voltage 5V/9V/12V battery pack.

http://www.amazon.com/Warranty-10000mAh-External-Battery-Charger/dp/B005NGKR54/ref=sr_1_1?t=slickdeals&tag=slickdeals&ie=UTF8&qid=1345071382&sr=8-1&keywords=anker+10000

And you will need a USB 3.0 F to F coupler - http://www.amazon.com/gp/product/B00695L9BE/ref=oh_details_o02_s00_i00?tag=amaz98-20
[Eee Pad Transformer Accessories] robtrevino:
I'm trying to find a solution for this as well.

I think that maybe if you use the 40 pin connector and isolate the USB 3 pins, send 12V so that is charges, and then power your device via an external hub, it might work.
[Eee Pad Transformer Accessories] al89nut:
Hi All

Followed this thread with interest.

I am using a Kodak 12V DC charger model MPA 630 from a photo frame and the USB adaptor thingie. It says exactly this "Output + 12 V --- 2 Amps (though it says 1.5 A max) also on the side. It is to charge my TF300T. Anyway, when plugged it, it charges fast, but here is a problem. The battery indicator keeps chiming and when it does the screen turns on (eg if it is off in standby). So if I turn the screen off with the power button, after a few mins, presumably when it enters standby, it chimes and the screen comes back on.

Any thoughts? Am I screwing it up to use this charger? I have stopped (only used it for 5 mins) and await your wisdom!

EDIT

Apparently it's because the charger doesn't deliver a consistent 12v. http://www.transformerforums.com/fo...-continuous-chiming-sound-while-charging.html
[Eee Pad Transformer Accessories] bobcatuk:
Last night it eventually happened, the Asus charger finally stopped charging, i knew it would happen one day, i have been having a few niggles with it, mainly around the two metal pins that go from the main block into the wall point part.

I remember reading about using USB to 5V adaptor, the same as this one on ebay HERE but i had forgotten that i purchased two of these until today, so i have just tried one of them out, connected to the power supply that connects to my Western Digital MyBook USB Drive (Input 100-240v ~ 50/60z 0.8A, Output 12v - 2.0A), it charges straight away with visible % increasing with the screen coming on as soon as it detects the power connected, which has saved me having a tablet but no power.

I have previously tried THIS type of charger which although initially worked fine, it literally blew up in the power socket after about a week of using it, i was glad i was at home at the time, so wont buy one of them again.

What are the other options are available, pay $61/£41 (including delivery) for the original HERE or are there other alternatives cheaper (but not a fire hazard), or should i just keep using the USB to 5V adaptor with my Western Digital MyBook USB Drive Power cable ?
[Eee Pad Transformer Accessories] *Detection*:
Try the freezer trick, stick the charger into a sealed zip bag and leave in the freezer for 20-30 mins

Its fixed a load of chargers for people, it resets some thermal fuse inside
[Eee Pad Transformer Accessories] ItzSnitz:
Converting an HP Charger

Hey Guys! I know this thread has been around for a while (and it getting really long). I purchased a TF101 earlier this year off eBay without a wall charger (data cable only). I had read about the issues with the OEM charger so I purchased an aftermarket (Chinese) 15v 1.5a charger as well. It worked great for about 6months before dying. :( Taking it apart it looks like the transformer coils are ruined. Instead of hunting for a replacement coil, I decided to modify an old HP laptop charger I had lying around.

The charger I'm using is rated at 18.5v and 6.5A. Measured output is closer to 18.8v. :fingers-crossed: At first I simply soldered a 200ohm resistor in line with the cut-off cable from the Chinese charger. The tablet indicated charging but didn't build up enough charge to boot. Additionally, the resistor got pretty hot (not a power rated resistor) so I did some digging and determined that a voltage divider circuit would be a better solution.

I used a handy online tool (linked below) to calculate the required resistance to provide ~15v. I'm using the same 200ohm resisitor for R1 and a 1kohm resisitor for R2 along with a 3A fuse for safety. Results in a ~15.5v supply. The tablet again indicates charging but I don't seem to be getting anywhere (won't build enough charge to boot, keep getting red battery screen). Since I've got 6.5a of supply to work with, I don't think the power brick is the issue. Even if it was for some reason under-supplied, I should still get SOME charge, albeit very slowly.

Getting to the point; does anyone know if the TF101 can handle a 18v supply? I'd like to try removing the voltage divider to see if maybe that's the problem. If that isn't the issue, maybe my battery has taken a dive? Love some help troubleshooting this issue. I'm no novice but I certainly would appreciate any advice moving forward. I have a USB3.0 port on one of my computers, so I could probably use it to test the battery (letting it charge overnight).

Thanks in advance!

Voltage Divider Circuit Calculator:

www (dot) raltron (dot) com/ cust/tools/voltage_divider (dot) asp

<guess i haven't posted enough yet...>
[Eee Pad Transformer Accessories] rosco_pc:
I would not risk using 18V on the TF.

I would go for a voltage regulator like a LM7815 (those are rated for 1A), you might look around for one that is rated for a higher current

And you provided enough information :) Just don't think that much people are interested anymore, I just found this while idly browsing around
[Eee Pad Transformer Accessories] ItzSnitz:
The thread certainly is getting pretty stale. I wound up charging the tablet off a USB3.0 port to ensure the batteries were still good, and dug around until I found another power brick to cannibalize. It's a 12V 2A and works like a charm. Not sure what it goes to, but I guess I'll cross that bridge later. :silly:
[Eee Pad Transformer Accessories] Nagrom Nniuq:
I know this is a 1 year res, but my charger just died finally and all the links in the OP are dead. Any ideas or suggestions on a charger now?
[Eee Pad Transformer Accessories] kevindt:
Just browsing this old thread myself to check the correct voltage for an Asus TF2 charger. After reading here, I just built one from an old 12V/1.5A wall-wart and female USB soldered together - it charges just fine.

Search EBay for Asus Transformer power supply :) There are a bunch of ready-built ones with cables (make sure the picture shows the Asus cable, not a micro-USB, though - some don't!).

For example: http://www.ebay.com/itm/AC-Adapter-...ader_Chargers_Sync_Cables&hash=item2a498c1b10
[Eee Pad Transformer Accessories] hosseinpars:
Thanks,nice DIY:cool:
[Eee Pad Transformer Accessories] makapuu:
How Did You Do It?

Please give me more detail on how you made the custom cable.

I have a TF101 and an XP18000.

I
[Eee Pad Transformer Accessories] slash143:
The post is rather old but may I suggest a comment: I guess the tablet sense the voltage across pin 1 and 4 (VCC and GND as per USB convention), not across 1 and 2 (VCC and D+ or D-).

That would confirm my previous comment :)
[Eee Pad Transformer Accessories] skchan2:
yea...comes with one free tip...working like a charm right now...
[Eee Pad Transformer Accessories] nlhall:
Great work DevCake for getting to the bottom of the USB extension problem.

Now we can extend the cable and build a new power brick. The weak link now is the proprietary connectors on the TF. Are we able to get hold of replacement cables?

Also do you think there will be an OEM car charger at somepoint!?
[Eee Pad Transformer Accessories] Rumbleweed:
Dev

Have you watched the signal on pin 7? Many LiPo charging chips determine the charge level of the battery and shut down the charger once full charge is reached. Just curious if the charge controller circuit in the TF uses pin 7 to shut down the charger. You could also see this by watching the 15v level on the asus charger when the battery reaches full charge.
[Eee Pad Transformer Accessories] DevCake:
I did not consider this. I'll test that today. I think the reason behind pin 7 is to make sure if a usb device is connected to the charger it will only get 5V.
[Eee Pad Transformer Accessories] DevCake:
Thanks,

I'm already on figuring out an alternative for the proprietary cable. I've seen that ipod/ipad cables have the same connector and people were able to charge with it but slowly. If that is the case any ipod cable along with my generic wall or car charger setup will work. I'll confirm that today.

Why get an OEM Car charger? Check the OP, you can get a cheap one that works great.
[Eee Pad Transformer Accessories] DevCake:
Ok Scratch that Ipad cable Idea, it's not the same as the Asus. What I saw was someone was using the Ipad charger and got it working with the Asus but slow.

I think we are stuck getting additional cables from Asus, I'm sure they will be available soon.
[Eee Pad Transformer Accessories] nlhall:
If the iPod cable works, then that and an auto DC suply would more than suffice. Let us all know how you get on.
[Eee Pad Transformer Accessories] DevCake:
I was mistaken, Ipod cables will not work.
[Eee Pad Transformer Accessories] DevCake:
OK first result, With the asus charger all pins routed as if it was a complete cable. Once the tablet reached 100% I got the "charged" notification and the voltage from the charger was still 15V. So the charger does not revert back to 5V once the charge is done, there is no handshake between the charger and tablet.

Tomorrow I'll repeat with one of my custom chargers.
[Eee Pad Transformer Accessories] martabakeju:
I bought the 1200uf universal adapter and it worked at first, but after that it won't charge anymore...and good thing my stock charger suddenly start charging again l.

I wonder if i should get the radioshack one instead
[Eee Pad Transformer Accessories] setite:
Please figure out a mobile solution. Using an inverter in my car with the stock connector scares me.

I use the following inverter and get massive interference when using the 3.5mm jack. I have to use A2DP to listen to audio.

http://www.amazon.com/PowerLine-903...?s=electronics&ie=UTF8&qid=1306566896&sr=1-24
[Eee Pad Transformer Accessories] sirejulius:
lost charging cable

Hey, DevCake,

This is an awesome guide for alternative charging method. I have a different situation here. I lost my usb charging cable and the power adapter in some airport someday and now my TF101 is just a dead machine out of juicy. I know it's stupid but is there anyway that I can find an another way to charge my device? or I can DIY one myself. Thanks.
[Eee Pad Transformer Accessories] DevCake:
You don't need an inverter. A standard 12V cara adapter with the right connector and USB adapter cable is the way to do. I've outlined what parts you need in the OP. Look for the "Car Charging" section.
[Eee Pad Transformer Accessories] DevCake:
That's a tough one. Because the connector is like no other you are at the mercy of Asus. There is no other way to charge the tablet that doesnt include taking it apart and charging the battery directly. I've got my eye out for the asus connector on my Chinese supplier sites and once I get one I'll create a cable building DIY. If I were you I would look for TF owners in area and try to borrow a cable but that might be a tall order also since no one can get extra cables yet.
[Eee Pad Transformer Accessories] DevCake:
Sorry that one didnt work, I was going to get one today but I think I will get the 1800 amp version instead. The only difference between the Radio Shack and the 1200uf is the amps, the Radio Shack one is 1500 so slightly more amps. I'll let you know if the 1800 works and if you got the 1200 at fry's you can return it for the 1800.
[Eee Pad Transformer Accessories] DevCake:
But you know the 1200 should still work, I have a 800ma adapter that is charging fine.

As much as I love the TF the charging and proprietary cable is a major sore spot.
[Eee Pad Transformer Accessories] dcmtnbkr:
If anybody finds something prime (or super saver shipping) eligable on amazon that would work, post it.
[Eee Pad Transformer Accessories] setite:
Ditto on this. I am a prime member. Anything "sold" or "shipped" or "fulfilled" "by Amazon" will work.
[Eee Pad Transformer Accessories] sirejulius:
Thanks. I will keep an eye on the asus online estore, hope the cable will be back in stock soon.
[Eee Pad Transformer Accessories] DevCake:
I just got the 1800UF and those tricky bastages put something in the USB connector to limit the voltage to 5.5V No matter what setting you put it on it maxes at 5.5-6V. The is a 3rd pin on the USB connector so I lopped it off, no change. I spun the connector around and there is was 12V BUT now the polarity is wrong. So do not do this to yours, you do not want the wrong polarity.

So the only way to use the X1 chargers is to get the DC to USB cable adapter I mention in the OP for $3 shipped from HK. Then you use the 5.5mm barrel connector on the 1200UF and the adapter cable, I've confirmed this to work.

That would bring your cost up to about $15 but you'll have to wait about 10 days for that adapter cable. Sounds like you are good with your factory charger now.
[Eee Pad Transformer Accessories] DevCake:
Browse Amazon for DC adapters and when you find any that qualify for prime post them and I'll let you know if it will work
[Eee Pad Transformer Accessories] DevCake:
Charging with custom setup does the same as the factory, tablet says "charged" and stops charging.
[Eee Pad Transformer Accessories] DevCake:
Updated OP with UK links to parts examples and updates X1 charger notes about included USB dongle.
[Eee Pad Transformer Accessories] martabakeju:
Thank you very much devcake! You're the best! I'm so glad Transformer has a very good dev community
[Eee Pad Transformer Accessories] Meltn:
This looks very promising.

Cables on order from Yewelong-

Thank You for the revelations!

Bruce
[Eee Pad Transformer Accessories] DevCake:
Thanks for the praise everyone, I don't like the "Man" forcing us to buy overpriced accessories =]

I've updated the OP with Polarity info because if you get polarity wrong when using a universal adapter you will damage your tablet. Thanks to glgehman for the suggestion.

Please read my OP completely before attempting to connect any universal chargers or post any questions here. No dumb questions here, just the occasional smartass response =]
[Eee Pad Transformer Accessories] okayfine:
How about connecting directly to the car's fuse box? You can use something liek that following to tap directly into the 12-14 volt line that comes on only when the ignition is on?

amazon.com/gp/product/B0002BGELQ

It has an integrated fuse so you can put in a 2 amp fuse so it will blow if the current is over that for some reason.

Would it work?
[Eee Pad Transformer Accessories] DevCake:
Sure, from there you can connect a USB female end to it but don't connect any 5V devices. IMO if you don't have the standard cigarette lighter adapter I would wire one up and then use the adapter I have listed in the OP. This way you can switch from 5V to 12V allowing for multiple device charging.
[Eee Pad Transformer Accessories] sebbes:
Thanks for this great post !!

Now I'm just curious about the car charging part, as the tablet needs around 13v we shouldnt need any "adapter" circuitry per se. Just have to find a way not to plug anything else but the TF.

Basically something like that:

car lighter plug: http://amzn.com/B0016LG0CY

and a USB female (or even better an Asus connector)
[Eee Pad Transformer Accessories] DevCake:
If you want to make a dedicated connection for your TF you could get a dual car adapter like this one.

And be able to connect your phone charger at 5V and your TF cable at 12V.

My truck has 2 car adapters, one hot all the time and the other on the ignition so I have both ready to charger.

Just make sure anything you get or make has a 2Amp fuse in it.
[Eee Pad Transformer Accessories] Rumbleweed:
If your vehicle has two 12V ports, I recommend using the always powered port. The switched port has some nasty power pulses on it when the ignition is turned on.
[Eee Pad Transformer Accessories] verkion:
Do you know approximately how much current the TF is pulling when charging at 12-15V? Just ballpark figure. I'm trying to look for a smaller sized adapter. 100W is overkill which means its "big". If it is only pulling 2A or so, a 25W adapter would do the trick and would be much smaller.

Thanks!

verkion
[Eee Pad Transformer Accessories] setite:
SO far what I do know is that this doesn't work. I bought it a while ago to have a high amp charger but i guess its 5V 2A :(
[Eee Pad Transformer Accessories] setite:
Mathematically 15V and 2A should be 30watts
[Eee Pad Transformer Accessories] DevCake:
Any standard off the shelf wall or car charger that has a USB port is going to be 5V.
[Eee Pad Transformer Accessories] DevCake:
+1

That's right 30 watts.
[Eee Pad Transformer Accessories] verkion:
Actually, I only threw the 2A figure up as an example. I was really curious as to what the actual measured current draw was. I re-read the original post and 11V/1A seems to be enough? 11W? That seems a little low to me...

Anyways, I figured out that I'm a moron and that I should have checked on the actual ASUS adapter itself. Specs are:

15V @ 1.2A = 18W.

A 25W adapter with a 15V output should be fine in that case.

Thanks!

verkion
[Eee Pad Transformer Accessories] verkion:
Hrm...might be worthwhile to note that pin 1 in the USB spec is the +ve rail and pin 4 is ground. I know that the importance of correct polarity is mentioned in the 1st post but the proper polarity was not specified.

Thanks!

verkion
[Eee Pad Transformer Accessories] DevCake:
You are absolutely correct, I've updated the OP. If anyone is modding a cable as long as you know black is ground and red is hot you are good.
[Eee Pad Transformer Accessories] stumpe:
Hi

Thanks for your work, DevCake, much appreciated :)

I have a question about the Multi function Car & Wall charger you posted in the OP, the Universal 100W Notebook USB AC&DC Power Charger 281 as i am in need of a car charger. In the specs on this says Output DC current :12v-20v:5A. How does this relate to the max 2A you have suggested as the max for the use with the Eee Pad Transformer?

Thanks
[Eee Pad Transformer Accessories] miguelantonio:
Hi,is there any other way of checking polarity?
[Eee Pad Transformer Accessories] yorkey:
Last time I rewired a USB prt I checked it with a cheap USB powered light. (bascally a LED on a bit of stiff wire) Its an LED so if you power it the wrong way round it doesnt light up, but doesnt get damaged either :)
[Eee Pad Transformer Accessories] miguelantonio:
Wow,simple yet effective.Thanks for the advice.
[Eee Pad Transformer Accessories] miguelantonio:
Is polarity different from one unit to the next?
[Eee Pad Transformer Accessories] miguelantonio:
Basically i've bought a generic ac/dc wall charger plus female barrel to usb and have read that i need to check polarity before charging? I dont want to blow up my new TF only had it a day.
[Eee Pad Transformer Accessories] DevCake:
Polarity

The generic adapter should have marks on both the dongles and the end of the cable that the dongle connects to. The mark should be a positive "+" and or a negative "-". As long as you match the symbol on the dongle and the cable end your polarity will be correct.

I posted a link in the OP to a page that explains more in detail about getting the polarity correct.

The light is a good idea for testing polarity. If you have a volt meter and a spare USB cable you can sacrifice I explain in the OP how to test the polarity with those tools.
[Eee Pad Transformer Accessories] DevCake:
Post a link to the adapter you bought and I'll take a look.
[Eee Pad Transformer Accessories] DevCake:
Your welcome.

Amp handling is different from one device to the next. Some devices can control the amps to control the charging rate. In my testing I saw a max of 1.5A on several adapters that were rated 2A, this didn't change during the complete charge period. So on paper a 5A device should be ok but not having a way to test that charger I can't guarantee it. If I were to use that charger I would add an additional 2a fuse in the barrel to USB cable. This way if the charger tries to push more than 2A the fuse would pop. It's not that difficult to do if you have done a little soldering.

One thing about those laptop chargers is because of the wide range of Amps that laptops use it has to be rated higher to cover them all.

If anyone wants to send me a charger to test I will as long as you cover the postage back. I won't modify the charger so you can return it if it doesn't work out.
[Eee Pad Transformer Accessories] miguelantonio:
Its the UK equivalent generic ac/dc adapter you have in your first post.
[Eee Pad Transformer Accessories] DevCake:
I couldn't see if there was markings on the connector ends. Did they mark the ends and the end of the cable they connect to?
[Eee Pad Transformer Accessories] miguelantonio:
I've ordered one but haven't received it yet but i wanted to make sure that I knew what to do to check polarity of the TF before i connected the adapter to it.

Im not technically minded in this field but wouldnt all TF's in the UK have the same polarity?