The ultracompact USB power adapters were supplied with every iPhone 3G sold in the following countries, and may also have been purchased separately as an accessory:

• US
• Japan
• Canada
• Mexico
• Several Latin American countries (click here for a detailed list of countries)

Note: Apple USB power adapters supplied with original iPhones or supplied with iPhone 3G units sold in other countries are not affected.

macfans论坛内ptyfeng兄买了一个美国原装的，美国官网价29$，地址Apple USB Power Adapter 迷你版终于到手。
我在淘宝上买了一个工包的，加运费一共58￥。
（别说我拍得不好啊，我手头只有一个很老的DC，能拍这样已经挺不错了…）
不出所料，该产品的Serial Number验证不了，不知道这批货出自何处。

实测：我的ipod touch2 从电力不足20％到完全充满（电池位置出现插头标志）一共花了两个小时四十分钟。