I went through all 23 pages and found nothing using the 10W wall charge on the iPad 4, but I found some useful info.
Long story short, I don't have the 12W wall unit nor the 8 pin cable.
I had an iPad 3 with a 9ft cable that charged when in use successfully so I purchased a 9 ft cable off eBay and lasted 2 days (cheap material maybe? I noticed it charged but battery still drained when in use. It did charge overnight though unmolested.
I am not sure if the brightness was lowered or not, so I am not sure if that contributed to not being able to charge when I was using it. I read the retina drains the battery even with it being on the charger.
Or if the 10W is sufficient to charge and use at the same time.
the eBay wall units don't say how many watts, so my question is..should I keep the 10W or buy a OEM 12W?
I plan on purchasing a new cable since I need one anyway. Any advice or suggestions are welcome