Image 2 (IMAGE) Nanyang Technological University Caption The team demonstrated their concept using orange peel, which recovered precious metals from battery waste efficiently. They then made functional batteries from these recovered metals, creating minimal non-toxic waste in the process. Credit NTU Singapore Usage Restrictions Use with mandatory credit 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.