| 1 | The core of each sphere is a crystal of lithium iron phosphate. | |
| 2 | The E6 uses the "Fe," BYD's lithium-ion ferrous phosphate battery. | |
| 3 | Others, made of iron phosphate covered in carbon nanotubes, form the positive poles. | |
| 4 | This lithium-phosphate glass is good at conducting lithium ions, though it cannot actually store many. | |
| 5 | Chemical compounds, including pyrophosphates and zinc citrate, are often added and have been proven effective. |