A battery the size of a grain of salt. Free Technical Library News

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A battery the size of a grain of salt

25.02.2022

A group of German scientists led by the Chemnitz University of Technology has created the smallest battery in the world - it is less than one square millimeter in diameter.

Such a battery has a capacity of 100 microwatt-hours per square centimeter. Subsequently, it can be used to power small sensors in the human body, such as those that monitor oxygen levels or monitor the recovery of the body after surgery.

During the creation of the battery, scientists used the same method that Tesla uses when creating its own batteries. Thin layers of polymer, metal, and dielectric materials were deposited on the surface of the stretched plate. When they begin to flake off from each other due to mechanical stress, a voltage drop occurs.

This method is compatible with established technologies for the production of microcircuits, and also allows the production of miniature batteries with high performance.

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Fitness tracker Moov NOW 25.07.2015

The company Moov, whose specialists are engaged in the creation of innovative fitness gadgets, announced the start of sales of the second generation of branded wearable devices that will appeal to all those who like to keep themselves in good shape through effective sports.

The Moov NOW fitness bracelet, according to the developers, will become more than just another "smart" bracelet on the market, which will be able to determine the level of your physical activity, the number of calories burned and the distance traveled, transmitting all the collected data to a mobile device paired with the tracker. The main feature of Moov NOW is the so-called "personal trainer" function, which is ready to take on tiny wearable electronics.

It is worth starting with the fact that it is recommended to wear a fitness bracelet not only on the wrist, but also fasten it around the ankle. In the first case, Moov NOW will accurately track the movements performed during training, which involve the arms and upper body, thanks to a "3D system" of sensors that allows you to fix the current position of your body.

In the second version of operation with a mount just above the foot, the companion mobile application will be able to give advice to the bracelet user regarding running technique and the optimal distribution of loads on the legs, say, during a bike ride.

Moov NOW has five modes - walking and running, cycling, swimming, cardio training with a punching bag. "Smart" electronics, ready to give you competent and relevant tips online, will help reduce the level of injuries, track your daily activity and analyze the technique of the movements performed, monitor the quality of sleep and provide a report on the effectiveness of training. But Moov NOW, unfortunately, cannot measure the heart rate protected from moisture and water.

The autonomous operation of the gadget is provided not by a battery, but by a standard watch battery, which is capable of supporting the operation of electronics for six months. At the moment, the Moov NOW fitness tracker is available for order on the manufacturer's website at a promotional price of $60, which is 40% lower than its declared retail price.

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