Finnish daily Helsingin Sanomat is pushing its content to an e-reader that does not require battey chargers. Starting in January, 300 readers in a pilot program will receive a free solar-charged device, which retails at about $65. The current device has a glass screen, but the next generation will be made of a flexible plastic that can be rolled, much like a newspaper can.The Finnish news publisher is testing whether giving away digital paper-like e-readers to subscribers is a cheaper solution than print distribution.