Table 6. Powering Systems.
| Power or energy density | Operation lifetime | Advantage/Disadvantage | Reference | |
|---|---|---|---|---|
| WPT | 1 μW cm–2 | – | High output power, heating issue | (307) |
| BFC | 3.5 μW cm–2 | 20 h | Fuels from body, limited lifetime | (308) |
| Supercapacitor | 333 μWh cm–2 | 80% after 10000 cycles | Cycling stability, high energy density, lower energy density | (309) |
| Solar cells | 1.24 μW cm–2 | – | Power generation from ambient light, stability issue | (310) |
| Flexible battery | 71.42 μWh cm–2 | 11.7 h | High energy density, limited operation lifetime | (306) |