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PowerGen Power-U Dual USB 2.4A 12W (fast) Heavy Duty Ouput Car Charger for Apple iPad 2, New iPad 3, iPad 4, iPad mini, iPhone 5 iPhone 4 4s 3Gs 3G, iPod Touch and Android Devices (cable NOT included) - White

2.0 de un máximo de 5 estrellas 1 opinión de cliente

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Información de producto

Detalles técnicos
MarcaPOWERGEN
Peso del producto41 g
Dimensiones del producto7,6 x 2,5 x 2,5 cm
Número de modelo del productoPGCHCAR24A-WH
Color2.4A White 2 USB
  
Información adicional
ASINB00622AG6S
Clasificación en los más vendidos de Amazon nº577.956 en Electrónica (Ver los 100 más vendidos)
Restricciones de envíoEste producto se puede enviar a España y a otros países seleccionados.
Producto en Amazon.es desde23 de junio de 2014
  
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Descripción del producto

The PowerGen Power-U Dual Port USB In Car charger charges TWO of electronic devices simultaneously, eg. iPad, iPhone, iPod, MP3 Players, Digital Cameras, PDAs, Mobile Phones and other devices. 2.4-Amp port is designed for Apple products, including iPad and iPhone. 1-Amp port is for mobile phones or other devices. It is compact with high quality finish.


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Color: 2.4A White 2 USB Compra verificada
Después de varios meses funcionando correctamente ahora no es capaz de cargar mi móvil de forma continua. No entiendo la razón pero el síntoma parece pérdida de contacto del cargador en el enchufe. El indicador de carga (luz azul en el cargador) se mantiene encendido pero el indicador de carga en el móvil muestra que la carga se detiene y vuelve a comenzar. Pensé que se debía a vibraciones pero sigue ocurriendo incluso si lo sujeto con la mano.

Debido a este inconveniente decidí comprar una batería externa.
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Amazon.com: 4.3 de un máximo de 5 estrellas 12.501 opiniones
2.271 de 2.352 personas piensan que la opinión es útil
4.0 de un máximo de 5 estrellas Amperage claims a bit deceptive 29 de enero de 2012
Por K. Crawford - Publicado en Amazon.com
Color: 2.4A White 2 USB Compra verificada
This product has two major issues:

1. While it's description claims it has a 2 Amp port and a 1 Amp port, the reality is that it has bridged the two ports and it can only source 2 Amps total. It is not capable of delivering 3 Amps combined like the description implicitly claims and could never simultaneously charge an iPad and a smart phone. (UPDATE: The technical details section now indicates more clearly the 2A total, which is appreciated.)

2. The 2 Amp port appears to be using the Apple protocol for USB power, so that port will only provide 0.5 Amps to most other devices.

The upside of this is the 1 Amp port somewhat over delivers, and can source 2 Amps if nothing else is connected and 1.5 Amps if the 2 Amp port is sourcing 0.5 Amps for a non-Apple device. Thus this product can support one-high power non-Apple device (in the 1 Amp port) and one lower power device (in the 2 Amp port).

Now some more background/details...

First, a little background on USB charging for those who don't know:

The USB power spec is for 0.5 Amps at 5 Volts... or 2.5 Watts. This was great up until the last couple years when devices have gotten really power hungry, particularly smartphones and tablets and to a lesser extent dedicated GPS's. Some of these devices use over 2 Amps, particularly the tablets like the iPad (or in my case the HP Touchpad).

Manufacturers of these devices therefore had a dilemma. If they had their devices pull more than 0.5 Amps, they risked damaging the power source, which could be a computer, that was only prepared to source 0.5 Amps. Thus the manufacturers have used tricks to determine whether their device is connected to an unknown source, at which point they purposely only draw 0.5 Amps, or to the dedicated charger that was provided with the device, where they can draw all the power they need.

There seem to be two common tricks used. The first is to short the two data-wires together in the charger. This is what most non-Apple devices do. Since a computer or older device wouldn't have done this, the device can assume it is safe to draw all the power it needs.

Apple seems to have taken a different approach, one that I don't fully understand but know can be seen by the fact that the data lines are neither open nor shorted when the charger is plugged in, and is more sophisticated and probably superior, because I suspect it allows the device to know exactly how much power it can use.

While Apple taking a better approach might be nice in concept, it's created chaos in the USB charger product category. What is the non-specific charger to do? They can't support both.

This device chose to go the Apple route for the 2 Amp port. I don't own any high-power Apple devices, so I can't say for sure, but I suspect this unit performs well with Apple devices. Using electronic equipment I was able to draw 2 Amps when putting a fixed load on this USB charging port. However, when I connect any of the 3 high-power devices I have (HP Touchpad (2 Amps), Motorola Triumph Android phone (0.85 Amps) and the LG Optimus Slider (0.7 Amps)), none of them drew all the current they could have, because they were expecting a shorted set of data-lines.

Luckily for my purposes, the 1 Amp port on this device uses the data-line shorting method. As such, it was able to deliver all the power my Triumph and Optimus wanted. However, for some reason, even when it was the only device connected, it would not fully charge the HP Touchpad at the 2 Amps it could have, because for one reason or another, the HP Touchpad rejected it as a high power charger.

To be honest, this surprised me because it was able to source the 2 Amps the Touchpad claims it needs and the HP Touchpad charger has the data-lines shorted. So I'm not sure why this didn't work.

Thus this device gets 3 stars (UDPATE: 4 stars) because it can source the current it claims (minus the somewhat deceptive 2A + 1A notation (UPDATE: Which is now more clear in the technical details)), would likely support an iPad like it claims, but falls short in other regards noted elsewhere.

For non-Apple users, or even more so mixed users (say an iPad and an Android phone?) this device is superior to the other device I purchased, the "Kensington K33497US PowerBolt Duo Car Charger" (http://www.amazon.com/gp/product/B003PU01M4/ref=oh_o02_s00_i00_details) because on that device, NEITHER port works with non-Apple devices (although it performed better power-wise, see my review over there for details).

I've ordered two additional devices:
- "Ultra Compact High Output Dual USB Car Charger - 2.1A Output" (http://www.amazon.com/gp/product/B00470C35E/ref=oh_o01_s00_i00_details)
- "Bracketron Universal Dual USB Car Adapter (UGC-298-BL)" (http://www.amazon.com/gp/product/B0056VNVV8/ref=oh_o00_s00_i00_details)

Hopefully one of the two of them will be able to deliver to their specs for my devices.

UPDATE: I've increased my review to 4 stars for two reasons:

1. The changed technical details text makes it more clear its total power capacity.
2. Of the 4 models I purchased, it's one of the two I kept and it's the only one I kept in unmodified form. That's got to count for something. :)
425 de 444 personas piensan que la opinión es útil
3.0 de un máximo de 5 estrellas Newer models are better 6 de marzo de 2012
Por C. MacPhail - Publicado en Amazon.com
Color: Negro Compra verificada
.
* Update Sept 2013: Newer models listed below are probably a better choice. Better output, better fit in socket.

PROs:

* Full-speed charging of iPad, iPhone, and more (see Note 1)
- Branded product. Amazon reviews apply to this exact item.

OKs:

- 1 year warranty

CONs:

- Wobbly fit in car socket (works OK though)
- Cheesy blue light -- always on

- - - Alternatives - - -

- Anker® Dual USB 3.6A Car Charger (compact)

- CoverBot Dual USB 3.1A Car Charger (lowest cost, also highly rated)

- PowerGen Dual USB 3.1 Amp Car Charger

- - - Apple and Non-Apple Devices - - -

Apple devices use their own method to decide charging speed. A designed-for-Apple charger may provide slower charging for non-Apple devices, and vice versa. For details, see K. Crawford's review: http://www.amazon.com/review/R1BSQFGYMS2DCH/ref=cm_cr_pr_perm?ie=UTF8&ASIN=B00622AG6S (Apparently this charger can also fast-charge non-Apple smartphones and other 1 Amp devices using the 1A port.)

- - - Notes - - -

Note 1: I tested using a 2-month old iPhone 4S while on/locked. These iPhone results do not apply to other phones.

30-50%. . . 50-70%. . . 70-90%. . . Avg . . . Charger
--------- . . . --------- . . . --------- . . . ------ . . . ---------
18min . . . . 18min . . . . 23min . . . . 1.02 . . . PowerGen Dual Car Charger - 2A port
18min . . . . 18min . . . . 21min . . . . 1.05 . . . PowerGen Dual Car Charger - 1A port
18min . . . . 19min . . . . 21min . . . . 1.03 . . . Kensington K39224US Car charger
18min . . . . 18min . . . . 23min . . . . 1.02 . . . Apple Wall Charger
33min . . . . 34min . . . . 37min . . . . 0.58 . . . 500mA car charger (Griffin)
35min . . . . 35min . . . . 39min . . . . 0.55 . . . 500mA computer USB port

Avg is "percent per minute" overall -- from 30% charged to 90% charged.

~~~ Comments & questions welcome ~~~
26 de 27 personas piensan que la opinión es útil
1.0 de un máximo de 5 estrellas Awesome until it caught on fire 27 de septiembre de 2014
Por Heart Dad - Publicado en Amazon.com
Color: Negro Compra verificada
This charger worked great for exactly 1 month. Then one day I'm driving home on the freeway and I notice this burning smell. The car charger, which is just sitting in the socket not charging anything has started smoking. I took it out quickly, burning my finger tips and almost causing a 50 car pileup in the process. Needless to say, I smashed it with a sledge hammer and burned the remains when I got home.

Pros:
- Fast charging! I got about 20-30% charge on my HTC ONE in 30 minutes.
- Two outlets.

Cons:
- It tried to kill me.
234 de 252 personas piensan que la opinión es útil
3.0 de un máximo de 5 estrellas Newer models are better 13 de marzo de 2012
Por C. MacPhail - Publicado en Amazon.com
Color: 2.4A White 2 USB Compra verificada
.
* Update Sept 2013: Newer models listed below are probably a better choice. Better output, better fit in socket.

PROs:

* Full-speed charging of iPad, iPhone, and more (see Note 1)
- Branded product. Amazon reviews apply to this exact item.

OKs:

- 1 year warranty
- Blue status light is maybe too large & bright

CONs:

- Wobbly fit in car socket (works OK though)

- - - Alternatives - - -

- 9to5Cables Dual 2.1A Car Charger

- Anker® Dual USB 3.6A Car Charger (compact)

- CoverBot Dual USB 3.1A Car Charger

- PowerGen Dual USB 3.1 Amp Car Charger

- - - Apple and Non-Apple Devices - - -

Apple devices use their own method to decide charging speed. A designed-for-Apple charger may provide slower charging for non-Apple devices, and vice versa. For details, see K. Crawford's review: http://www.amazon.com/review/R1BSQFGYMS2DCH/ref=cm_cr_pr_perm?ie=UTF8&ASIN=B00622AG6S (Apparently this charger can also fast-charge non-Apple smartphones and other 1 Amp devices using the 1A port.)

- - - Notes - - -

Note 1: I tested using a 2-month old iPhone 4S while on/locked. These iPhone results do not apply to other phones.

30-50%. . . 50-70%. . . 70-90%. . . Avg . . . Charger
--------- . . . --------- . . . --------- . . . ------ . . . ---------
18min . . . . 18min . . . . 23min . . . . 1.02 . . . PowerGen Dual Car Charger - 2A port
18min . . . . 18min . . . . 21min . . . . 1.05 . . . PowerGen Dual Car Charger - 1A port
18min . . . . 19min . . . . 21min . . . . 1.03 . . . Kensington K39224US Car charger
18min . . . . 18min . . . . 23min . . . . 1.02 . . . Apple Wall Charger
33min . . . . 34min . . . . 37min . . . . 0.58 . . . 500mA car charger (Griffin)
35min . . . . 35min . . . . 39min . . . . 0.55 . . . 500mA computer USB port

Avg is "percent per minute" overall -- from 30% charged to 90% charged.

~~~ Comments & questions welcome ~~~
2.0 de un máximo de 5 estrellas VERY Low profile, Fastest charger of non iphones! 14 de junio de 2012
Por Tommy Madison - Publicado en Amazon.com
Color: Negro Compra verificada
UPDATE: 01/22/13
I have just purchased a replacement charger because it will never stay insider the outlet, it always slips out and stops charging. It still works, still charges fast, and the subtle blue light is nice, but I cant stand to keep pushing it back into the outlet ever time I use it. Fix the side plugs to actually hold it in place and I would buy it again in a second.
Reducing it from 5 stars to 2.

This thing is very tiny and low profile. I have a Samsung Galaxy S2 phone. This charger is half the size of my stock Samsung charger. It fits perfectly in the charger, it has small button contacts instead of prong style like we are used to so it may wobble from side to side but will never lose connection.

For non iphones such as mine, You want to charge it in the 1A port not the 2A port. The 1A port charges my phone nearly twice as fast as either the 2A port or my old stock Samsung charger.

I have had so many chargers to find the fast type charger that, really is a fast one and this is the best of the best. I through out all my other "fast" chargers out and only use this one.

Disappointed that it did not come with any cable options what so ever, so remember to buy one of these also.

Still gave this 5 stars because it is the only fast charger that is really fast for my phone (galaxy)