"This Best Selling PowerLine Dual Hi-Power Adapter with 6 Foot Charge/Sync Cable for iPod/iPhone/iPad (90342) Tends to SELL OUT VERY FAST! If this is a MUST HAVE product, be sure to Order Now to avoid disappointment!"
Many iPad associated adapters only put out a total of 2.1 amps. The PowerLine product provides 2.1 amps per port for a total of 4.2 amps. Other similar products may not FAST charge an iPad at the same time that it is charging an iPhone, let alone charge TWO iPads simultaneously. If the product is not designated as a Made for iPad/iPhone/iPod, the charger’s electronics also may not contain the passive logic that tells the iPad it is capable of FAST charging so it may not FAST charge an iPad at all. A simple way to think of this is as follows: a computer USB port offers 500 mA of charging power. An iPad will slow charge when it is in its OFF position while connected to a computer. IF the iPad does not see 2.1 amps and the correct resistor settings from the USB power source, the iPad slows the charge like in a computer’s USB port. To FAST charge an iPad it requires 2.1 amps and the correct resistor from a USB charging port. Other multi USB port chargers can’t FAST charge the iPad if another device is also connected. ONLY the PowerLine Dual 2.1 amp Adapter provides both 2.1 amps and the resistor setting to FAST charge from EACH USB port (4.2 amps total).
After searching for the past six months and going through at least a half dozen or more iPad chargers, I have finally found a charger that will fully charge up my iPad 3 in record time. Most chargers were taking up to 5 to 6 hours which was a big hassle waiting. In fact, with 2 USB ports to charge 2 iPads and 2.1 amp rating for each port, the unit is powerful enough to charge the units in about 2 hours. A little expensive compared to other units I have bought but well worth the cost, in my opinion, since it works. I now own 4 of these units which I’ve spread throughout my house and at my office. And the long 6 foot charging cord is the right length for most of my iPad applications, like reading in bed or reclining in my La-Z-Boy. One note: the unit comes with only one cord–not a problem for me since I have lots of extra cords from other units I have bought. I highly recommend it.
Turns out, in order for the tablet to “negotiate” full charging it must “sense” that there is no data flow from the tablet to the charging station. Most of your tablet chargers do this by shorting out the data pins in the charger itself to “convince” the tablet that it take a full amp charge. Apple doesn’t do/need this, so when plugging in a standard USB data/charge cable, the tablet believes it’s being plugged into a PC and will only allow slow charging (around 100-500mA).
I got around this by purchasing “charge only” USB data cables (search Amazon and you’ll find them). These cables have the data pins in the cable itself shorted out and therefore cannot be used to transfer data, only charge. Once I got these and plugged them in, BINGO, FAST CHARGING!!
So, this product, using “charge only” USB cables, works wonderfully with Android tablets as well.
However – as others mentioned, it’s best to use a “charge-only” cable, else you don’t get the full benefit of the charger. I’ve found this to be true when charging my Nook HD (Sorry Kindle! Next time.)
Since there isn’t a charge-only cable for the Nook (to my knowledge, anyway) this adapter doesn’t work for that purpose. Using this adapter with the Nook charge/sync cable:
– The green light comes on, indicating a full charge, even when it’s not the case. The light should be amber until fully charged.
– The little lightning bolt/charging symbol doesn’t appear.
– Device says “discharging” when plugged in.
– % Charge hasn’t changed (increased or decreased) in the 5+ hours I’ve had it plugged in so far today. Started at 70% and it’s still there.
What I find unusual is that other (non “high power”) USB wall adapters I have (some generic, and a few I have for my Moto phone) charge it just fine: amber light, charging icon, etc. – so it’s not simply that the PowerLine is not a Nook charger. (I misplaced my Nook adapter months ago, so have been using what I’ve got.)
I’m not taking any stars off for this – it’s not the charger’s fault, and it works marvelously for other things – but only mention this for any other Nook owners who are looking for a dual USB charging solution. This isn’t the answer for you.
Please feel free to comment and let me know if you think I’m missing something here…