Disposable diagnostics tests such as pregnancy tests require small batteries or fuel cells to work. Considering that these devices can typically only be used once, an engineer is developing small, nontoxic, inexpensive fuel cells that can be disposed of without ecological impact.There are two reasons why these single-use fuel cells are incredible. First, they are made mainly using paper; and second, instead of relying on lithium, these paper fuel cells use bodily fluids such as saliva and blood.
These tiny paper-based fuel cells run on bodily fluids
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