Chinese University of Hong Kong
Researchers out of the Chinese University of Hong Kong have used a polymer commonly found in skin cream as a stabilizing agent for an aqueous lithium-ion battery, keeping costs and toxicity low and creating a stable voltage for common usage.
As compared to most other joints in the human body, the knee has quite a large range of motion … so why not put that motion to use, as a source of electricity? That's what a new prototype device does, and it reportedly does not cause its wearer to expend more energy while walking.
Atrial fibrillation is the most common type of arrhythmia and left unchecked, it can potentially cause strokes. Ordinarily, it's detected by hooking the patient up to an electrocardiogram (ECG). Now, however, an app has been developed that does the same job.