There are currently several attempts at using different battery technology that the now-widespread Lithium-Polymer to achieve long flight times: http://diydrone

There are currently several attempts at using different battery technology that the now-widespread Lithium-Polymer to achieve long flight times: http://diydrones.com/profiles/blogs/my-97minute-06second-record-quadcopter-flight http://diydrones.com/profiles/blogs/my-97minute-06second-rec...