Replacing an iPod battery is not easy; however, one user wowed crowds at Macworld San Francisco by replacing iPod batteries blindfolded. Jamie Dresser, Product Manager of New Product Development at Other World Computing was acting on a challenge. Dresser took iPods from audience members and went through the intricate technical process of opening the iPod casing without damage, installing a higher capacity NewerTech NuPower battery-- all with his eyes completely covered. Dresser then sealed each iPod's casing to a like-new appearance in perfect working order, boradcast on an oversized plasma screen behind him for view by the continually growing audience. "Do not try this at home," joked Dresser to the capacity audience as the blindfold was secured on him during each demonstration.