SolarKindle measures 7.9×4.7×0.7 (in inches) and weights 7.6 ounce. The total weight of Kindle and the SolarKindle will take the total weight close to 14 ounces. Still less than many cholesterol affected Android tablets out there.
There is a LED light to facilitate night time reading.
SolarKindle which is a case cum charger has an in-built 1500 mAh battery. Which means it stores energy and Kindle will draw its energy from the battery and not directly from the sun. You can read even when it rains.
The LED light also draws its energy from the in-built battery.