http://maxborgesagency.com/press/bracketron-launches-dual-usb-charger/
$24.99 dual USB Cigarette lighter adapter 1 & 2 amp
Reeves360 said:
http://maxborgesagency.com/press/bracketron-launches-dual-usb-charger/
$24.99 dual USB Cigarette lighter adapter 1 & 2 amp
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Click to collapse
Unfortunately, worthless.
Transformer needs 11v-15v to charge reasonably well. Any 5v charger, even at 1000000 amps, will not charge the TF with screen lit, or charge takes days with TF turned off.
Much harder to find auto chargers in the 11v-15v range, some that say 12v are actually not. I found one advertised as 12v (that measures 9.8v actually) and it also did not charge TF. Good luck.
Wont work. Unlike most devices the Transformer does not use 5v to charge like the iPhone and many other Android devices. It does use USB but it will only charge via Asus's special chargers. This is because our Transformers charge via 15volt and the charger cable is actually a USB 3.0 cable that has extra pins in back, and the 15volt pin is one of these extra pins the USB 3.0 layout provides.
Edit Bob Smith42 beat me to it by a few seconds lol
Be aware that it's incorrect to say that the TF won't charge from a standard USB charger. It does charge however it only trickle charges and therefore takes much longer. So let's make sure we are clear when we respond about what works and what doesn't. I used my iPad 2 amp charger on the TF and went from about 30% charge to about 85% charge in about 6 hours (screen off). The absolute fastest way to trickle charge from a generic adapter is with the TF powered off. Hopefully Asus will come out their own car adapter for the TF.
The charger that the original poster mentioned WILL trickle charge the TF. Also new TF users should know that the TF will not give any charging indications when plugged into anything other than the Asus charger - but it is trickle charging none-the-less.
w4rmk said:
The charger that the original poster mentioned WILL trickle charge the TF. Also new TF users should know that the TF will not give any charging indications when plugged into anything other than the Asus charger - but it is trickle charging none-the-less.
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Click to collapse
One thing to mention that you can do if you have the tock is trickl-echarge THAT while still using the pad... then in 5-6 hours when the padd is getting low, you can dock it, and it will charge off of the dock while you keep using it. Once fully charged, undock it again, etc. This is what I want to do, and why I want a second USB cable.
I have a DC Charger Adapter(I got for my Samsung Galaxy Phone) that allows me to plug in any USB Power Cable to charge a Device.It states it has a 2 amp Fuse and rated for 500ma. Does anyone know what the requirements are for charging a Prime from a DC source? I think this should work on my TP but thought I'd ask first.
Thanks
If it works, will be nothing more than a trickle charge.
Sent from my Transformer Prime TF201 using Tapatalk
RonH54 said:
I have a DC Charger Adapter(I got for my Samsung Galaxy Phone) that allows me to plug in any USB Power Cable to charge a Device.It states it has a 2 amp Fuse and rated for 500ma. Does anyone know what the requirements are for charging a Prime from a DC source? I think this should work on my TP but thought I'd ask first.
Thanks
Click to expand...
Click to collapse
To charge at a normal rate, you'll need 2.1 amps @ 15 volt OUTPUT. 12 volts output will also work, albeit slower.
Normal USB at a maximum is 2 amp, 5 volt output.
i have this tablet for a couple days now, when i plug the power adapter to the mains the power adapter gets really hot.
does anyone have the same result or is just normal? i know that the adapter obviously will get hot, but it seems a bit to hot, just the adapter the usb cable is fine and so is the tablet
Its normal. If it gets to hot it shuts off. I hear you have to put it in the freezer to attempt to bring it back.
Sent from my VS910 4G using xda premium
well, i just dont want to wake up one morning and find the all lot burned.
but it does get really hot
Noticed the same thing with mine. I'm actually on my second pad for other reasons, but I didn't notice the charger getting as hot with my first one. But it only seems to get hot when actively charging. I've checked it after letting it sit still plugged in, but after it finished charging and it was fine.
I just try not to leave it charging if I'm sleeping or going out. Although, I forgot to unplug it this time...
Sent from my DROID BIONIC using Tapatalk 2
can we charge the tablet via the pc usb port?
its hard not to leave the tablet charging over night when your using every day
LUCA LUCA said:
can we charge the tablet via the pc usb port?
its hard not to leave the tablet charging over night when your using every day
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Click to collapse
No. Other threads in this forum tell you why.
the reason the charger gets so hot is it's 15 volts
and it takes minimum 12 volts for the tablet to kick into charging mode
so to answer your question
a usb port does charge the tablet, but usb is only 5 volts
so it will not show charging
and it will probably take 24 hrs to fully charge
Mine gets hot while charging but once it hits 100% it cools back down. I don't charge it while sleeping for this reason. Also according to the manual the PC will charge it bult as previously mentioned it takes longer. The tablet must be powered off when charging this way or it won't charge.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Same as other itt, it will heat up when charging, but if it's left in the wall unplugged from the tab/dock it cools back down.
Perhaps it needs 12v for full charge speed, but the 300 also trickle charges when plugged into a computer USB port.
i have notice that, when it finishes charging, that just cools down, i was just wondering did i get a faulty one, but as ye say its normal
thanks for all the replys
Luca
even there the charger gets very hot, so it is normal, also, we are going to have very hot temps these days, (40°C here)...
just be sure to not plug it near easy flammable things!
ciao
Yes we have noticed the charger gets very hot might have something to do with fast recharge time the device has
Sent from the network via FTL com buoy
Good evening,
On my charger i notice it is wrting : "output 5v--2A or 15v --1.2A"
This mind that i can use the charger for any phone that charge usualy wiht 5V ?? Do the charger "swap" the voltage by him self if it's not connect to the tablet ???
I don't want to burn my HTC, but to have one charger for the tablet and the phone will be good when travelling
Thanks
Yann
Sent from my ASUS Transformer Pad TF300TG using xda app-developers app
yannmrt said:
Good evening,
On my charger i notice it is wrting : "output 5v--2A or 15v --1.2A"
This mind that i can use the charger for any phone that charge usualy wiht 5V ?? Do the charger "swap" the voltage by him self if it's not connect to the tablet ???
I don't want to burn my HTC, but to have one charger for the tablet and the phone will be good when travelling
Thanks
Yann
Sent from my ASUS Transformer Pad TF300TG using xda app-developers app
Click to expand...
Click to collapse
The charger that comes with the Transformer is dual-purpose. If you plug in a Transformer tablet, it'll output the 15V to rapid-charge your Transformer. If you plug in a USB device, it'll output 5V at 2A to rapid-charge your USB device.
If you're wondering how it can tell the difference, Pin #7 on the USB3 Transformer cable is grounded -- this is how the charger can tell the difference between a Transormer and an ordinary USB device.
yannmrt said:
Good evening,
On my charger i notice it is wrting : "output 5v--2A or 15v --1.2A"
This mind that i can use the charger for any phone that charge usualy wiht 5V ?? Do the charger "swap" the voltage by him self if it's not connect to the tablet ???
I don't want to burn my HTC, but to have one charger for the tablet and the phone will be good when travelling
Thanks
Yann
Sent from my ASUS Transformer Pad TF300TG using xda app-developers app
Click to expand...
Click to collapse
In fact the charger of Asus is quite tricky. I haven't found any substitution, only stock charger can be used.
hung2900 said:
In fact the charger of Asus is quite tricky. I haven't found any substitution, only stock charger can be used.
Click to expand...
Click to collapse
the connector look to be non standard as if you put an usb extension cable it wont charge.
NixZero said:
the connector look to be non standard as if you put an usb extension cable it wont charge.
Click to expand...
Click to collapse
It's not a non-standard connector -- it's a USB 3.0 connector.
If you use a USB 3.0 extension cable, it will work. If you use a non-USB 3.0 extension cable, the charger won't see that pin 7 is grounded, so you'll just get 5V instead of 15V. There's no bi-directional communication between the two.
The Transformer will charge when it sees 12V to 15V on what's typically the 5V pin.
The Asus charger will output 15V (earlier units were 12V) when it senses pin 7 is grounded.
Also, if you'd like to build your own power supply -- get any old female USB connector, and send 12V to 15V on pin 1 instead of 5V, and you've got yourself an Asus Transformer charger. Just don't plug anything else into it, since there's no safeguard to prevent 12-15V going into a 5V device. I've painted mine orange so I don't mistake it.
Hi, my Transformer pad won't charge normally when I connect it to the power adapter direclty - it doesn't show it's charging (though I can tell it is, because after some half an hour it had 2 % more of battery)... can it be that the charger doesn't recognize the tab and gives only 5V? Why? It works normally when I charge it on the docking station (through the power adapter), and the same cable works normally when I use it to transfer media to the pad from the PC...
P.S. When conneted to the power adapter directly, the orange light on the power button of the pad doesn't go on... it only goes on when the pad is on the dock and the power adapter is plugged into it.
Any ideas?
krhainos said:
The charger that comes with the Transformer is dual-purpose. If you plug in a Transformer tablet, it'll output the 15V to rapid-charge your Transformer. If you plug in a USB device, it'll output 5V at 2A to rapid-charge your USB device.
If you're wondering how it can tell the difference, Pin #7 on the USB3 Transformer cable is grounded -- this is how the charger can tell the difference between a Transormer and an ordinary USB device.
Click to expand...
Click to collapse
krhainos said:
It's not a non-standard connector -- it's a USB 3.0 connector.
If you use a USB 3.0 extension cable, it will work. If you use a non-USB 3.0 extension cable, the charger won't see that pin 7 is grounded, so you'll just get 5V instead of 15V. There's no bi-directional communication between the two.
The Transformer will charge when it sees 12V to 15V on what's typically the 5V pin.
The Asus charger will output 15V (earlier units were 12V) when it senses pin 7 is grounded.
Also, if you'd like to build your own power supply -- get any old female USB connector, and send 12V to 15V on pin 1 instead of 5V, and you've got yourself an Asus Transformer charger. Just don't plug anything else into it, since there's no safeguard to prevent 12-15V going into a 5V device. I've painted mine orange so I don't mistake it.
Click to expand...
Click to collapse
Good info to know, Krhainos. Thanks for sharing that with us. I've been wondering about using the Asus plug for other USB devices I have and the information you supplied answered those questions. :good:
Hello. I want to be able to charge my Transformer Prime in my car. It didn't work with my 500mA GSM charger (which is normal, I guess), so I bought Tom-Tom "High Speed Multi Charger" (i can't post links), which is advertised as tablet (namely iPad of course) charger with 2A USB output port. Strangely it does not charge Prime too ! So my question is what voltage and current is needed to charge Prime ? Do I need a special cable ? Charger, that comes with Prime, says "OUTPUT: 15V/1.2A OR 5V/2A", which is strange for me also ?!?
15V if device is on, 5V if it is off.
Striatum_bdr said:
15V if device is on, 5V if it is off.
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Click to collapse
Hmm, it doesn't charge. What do you mean "if it off" ? I tried to charge it when it is off, but it just turns on when I plug-in cable. If I turn off (long press button and select "shut down"), while it is still with plugged cable from charger I think it still does not charge - at least red LED does not light.
Question about device. Does it need 18+W charger like Nintendo Switch? It's just both of them are the only mobile devices I have that doesn't (NS) or almost doesn't (SD) charge when on 5V charger.
When I correct Duo to 5V charger is its so slowly charging than when used is actually discharging...
it could be your charger or your cable. I have a 5V charger and it goes up to roughly 2amps while charging. I have a USB ammeter, tested it this morning because i thought I was having charger issues (a reboot fixed my issue)