I noticed they were made in China so maybe the plant isn't up to U.S. spcifications yet. By the way, on my last trip with heavy useage, lots of email and an extra long day due to the time difference I did drop down to 50%, the lowest I have seen on my super battery. The day before also on heavy useage while traveling, including one long speakerphone conference call I dropped to 75%. No dust specs yet.
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