The Biobattery (IMAGE) Fraunhofer-Gesellschaft Caption The biobattery is modular and consists of a pool of environmentally-friendly technologies such as biogas plants, thermal storage, carburettors and engines to produce electricity. Credit Fraunhofer Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.