Got my 4th generation Friday. No one at the Apple Store warned me about this new charging issue, when I made my purchase (opps, must a slipped their minds). Neither is the charging voltage change mentioned in any of the tech data I read before purchase or with the info provided with the product, or on the guide I downloaded from APPLE... SURPRISE!
I never expected it to charge this on my old firewire wall adapter, but I can't even charge it through my USB (apple built) wall adapter, and that is a recent purchase, and charging at this lower voltage is WAY... TOO... S...L...O...W. My totally depleted battery has been charging 8 hours and still isn't nearly back to 100% charge.
I'll probably pony up for a new wall charger and car charger, but I beginning to be a bit miffed that I am not getting good data (or customer service from Apple). A recent quicktime auto update (?) also eliminated/negated a previous upgrade that I paid for paid for. Who ever heard of a free update taking away a "paid for" upgrade. That's amazing.
These "scumbag" sales and service tactics seem like something more typical of Bill Gates than Steve Jobs. I feel I should have been given better information about this product, and Apple should make a wall adapter that recharges all their products. My TOUCH recharges on my old adapter, and it's NEW technology. I am getting disgusted and very DISAPPOINTED in this company! I will be checking in at the Apple Store later this week.