Hyundai picked Windows Mobile for its new flagship smartphone because it’s the most widely used business smartphone platform, but it didn’t want just another Windows Mobile 6.1 2.8-inch QVGA touchscreen phone. So, Hyundai made the MB-8500 different by adding a 1600mAh battery instead of the usual 900mAh. With other phones, says Hyundai Mobile CEO Christian Kirchner, ”If you are using Wi-Fi and Bluetooth together, at end of the day your battery is 90% empty. In our tests if you're using this phone heavily with Wi-Fi or Bluetooth after three days the battery starts to get low. That’s surfing the Internet, doing 60, 70, 80 emails a day, using Wi-Fi, using the GPS, everything. That’s even more impressive in a 13mm thick phone that weighs only 110 grams. Hyundai did experiment with adding a slide-out keyboard but it made the MB-8500 too thick. It launches in May (initially in Europe and South America) with Windows Mobile 6.1 but Hyundai promises an upgrade to 6.5.