Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

Legacy electronics have prevented significant advancements in alkaline batteries

While lithium-ion batteries have increased in energy density multiple times since their commercialization in 1991 and can be sized to various capacities by connecting numerous electrochemical cells, disposable alkaline batteries have been forced to maintain their 1.5-volt standard and form factors for compatibility with existing devices.

During manufacturing, lithium-ion and alkaline batteries are tested for short-circuiting

Lithium-ion batteries are made by manufacturing anodes, cathodes, and electrolytes via chemical processes, assembling these components into cells, and enclosing multiple interconnected cells within a protective casing. Disposable alkaline battery production involves filling steel containers with preforms—rings of powdered cathode material—paper-based separators, electrolyte solution, and an anode gel.

The first lithium-ion battery was invented at ExxonMobil

Initially a side project that became a priority due to the 1973 oil crisis, the battery's flammability risks and manufacturing challenges, along with the waning crisis, led the company to shut down its battery program. Other researchers would gradually improve upon published prototype designs in the next decade.

Watch a tour of a battery manufacturing gigafactory

Inside Contemporary Amperex Technology Limited's facility, China's largest EV battery manufacturer uses slurry mixing, "jelly rolling," electrolyte injection, and other techniques and equipment to transform raw metals such as lithium and magnesium into approximately 2.2 million electrochemical cells daily.

Solid-state batteries substitute the fluid electrolyte layer with a solid

The non-flammable solid greatly reduces the risk of fire and explosion, as well as the release of toxic gases via leaks in the existing sulfide-based systems. These batteries use garnet-type solid electrolytes, which provide high ionic conductivity and chemical stability but require temperatures above 1,000 degrees Celsius (1,800 degrees Fahrenheit) for fabrication.

Visualize the minerals used in a lithium-ion battery

The lithium cathode includes nickel to increase energy storage per unit volume, as well as cobalt and manganese as stabilizing agents. Anodes are composed entirely of graphite, with aluminum and copper composing the current collectors for the cathode and anode, respectively. The battery is enclosed in a steel casing.

Benjamin Franklin described a series of static electricity storage jars as 'batteries'

Discovered over 50 years before the first electrochemical cell was invented, Leyden jars stored electric charge between the metals inside and outside a liquid-filled container. Franklin was the first to use the term "battery" in an electrical sense, though his multiple-jar device—lacking chemical reactions—was actually a series of capacitors.

The first compact cassette tape was introduced at IFA 1963

At IFA 1963 in Berlin, Philips introduced the compact cassette tape. This new standardized audio format replaced bulky reel-to-reel tape and would go on to dominate home recording and music listening for decades.

Nuclear batteries generate electrical currents using radioactive materials

Rather than using electrochemical reactions to produce the electrons that flow through a circuit, isotopes like nickel-63 undergo beta decay—emitting electrons—which a semiconducting material can absorb to establish a charge imbalance that generates current. Such batteries could provide low-power energy for decades.

At CES 1996, Panasonic unveiled the first DVD player to the public

This demo disc from Panasonic’s 1996 CES reveal showed audiences how DVDs offered sharper video, interactive menus, and greater storage—introducing a new era in home entertainment.

Inside a company making millions on retro, refurbished technology

Retrospekt is one of the many companies flipping old, fan-favorite technology like Polaroids, cassette tapes, and Tamagotchis. Studies show that nostalgia can make people spend money and is one of the driving forces behind the demand for second-hand gadgets.

Laser disc technology stores binary data in etched pits and lands

The pits are dips in the LaserDisc, CD, DVD, or Blu-ray surface that do not reflect the laser from the optical drive back to the photoelectric cell, resulting in a coded zero. Lands are reflective plateaus on the surface that code for a one.

Over-the-air updates, pioneered by Tesla, have become the industry standard

Tesla's innovative direct-to-consumer sales model and online ordering system changed car-buying, and the Model S, which had a 200-mile range, forced other automakers to enhance their EV offerings and rethink vehicle design.

The tiny Japanese village responsible for the world's best turntable needles

Hamasaka is an unassuming village four hours from Kyoto, but it's an important location for audiophiles thanks to its JICO factory, which manufactures turntable needles that replicate vintage and discontinued models.

Samsung makes much more than smartphones

Samsung is best known for its highly popular smartphones and related consumer electronics. But the business, first created in 1938, is a conglomerate invested in container shipping, tank building, and even real estate construction like the Burj Khalifa. Its annual $200B in revenue comprises 20% of South Korea's gross domestic product. Watch this video for more on this diverse, enormous company.

Thomas Edison inadvertently spurred the film industry's move to Hollywood

The inventor's patent on the motion picture camera included several stipulations that required independent movie studios to work with Edison's Motion Picture Patents Co., making the East Coast undesirable for aspiring filmmakers.

Solar panel manufacturing begins with silicon extracted from sand

The silicon is purified and shaped into wafers less than 0.2 millimeters thick, coated and connected through a criss-cross pattern of narrow and wider metal, followed by multiple rounds of lamination before bonding to a weatherproof panel.

Japanese scientists develop an eco-friendly plastic that dissolves in saltwater

The strong and flexible plastic is made from molecules held together by saltwater-sensitive chemical bonds. The components left after the plastic breaks down within hours contain phosphorus and nitrogen, allowing them to serve as soil fertilizer.

Microsoft developed the Xbox to compete with Sony's all-in-one entertainment hardware

The video game console originated as a side project between four DirectX developers, from whom the console's original name, "DirectX Box," derives. These developers sought to counter Sony's PlayStation product line, which they saw as capable of capturing all entertainment markets by playing games, CDs, and DVDs.

Candymaker Haribo focuses on gummies to simplify production

Focusing on a specific kind of candy gives the company expertise on texture, ingredients, factory processes, and more. The company's decentralized production allows for regional specification.

Rune Elmqvist forwent practicing medicine to invent the first inkjet printer

The Mingograph recorded real-time physiological signals from a patient's electrocardiogram, helping doctors diagnose heart and brain conditions. Eight years later, in 1958, Elmqvist worked with cardiac surgeon Åke Senning to develop the first fully implantable pacemaker.

The first circular particle accelerator was narrower than the average cereal bowl

The 1939 Nobel Prize in physics was awarded to Ernest Lawrence for inventing the cyclotron. By comparison, the Large Hadron Collider is 5 miles in diameter and is the largest cryogenic system in the world, cooling its electromagnets to temperatures colder than those found in outer space.

Mechanical watches measure the passage of time via the vibration of a quartz crystal

When electricity from a battery passes through the crystal inside a watch, the crystal vibrates, creating an electrical signal with a precise frequency of one vibration per second. This signal moves the hand of the watch so that it ticks once per second, allowing it to track the passage of time.

Pizza boxes are square for practical reasons

Although circular pies have sometimes appeared in circular boxes, they usually travel in square, cardboard boxes. That's because the cardboard industry manufactures them with edges so they can be made in one piece and be easily stacked.

Modern roll-on deodorant design was modeled on the ballpoint pen

Instead of a messy cream, which had been the norm in the 1940s, a new roll-on deodorant inspired by the easy flow of a ballpoint pen debuted in 1952.

Objects can be 3D printed with light by projecting 2D computerized tomography (CT) scans onto rotating cylinders of resin, which solidify upon exposure.

Planeterrellas create artificial auroras that mimic the atmospheric displays of light by setting up an electric field between two metal balls in a jar filled with a small amount of air.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes

The history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

Walt Disney's early film 'Alice's Wonderland' was a groundbreaking innovation in the silent film era

The animatronic shark from Steven Spielberg's 'Jaws,' the first modern blockbuster, was a complex underwater apparatus called 'Bruce.'

Dozens of S&P 500 stocks, including Coca-Cola and Walmart—known as the dividend aristocrats—have increased dividends every year for 25 years

How fusion—which releases energy when two lighter atoms combine to form a heavier atom—differs from fission

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

Electrical grids worldwide must double their power delivery capacity by 2050 to meet surging demand from AI and electric vehicles.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

See the evolution of Ebola vaccine and treatment development.

The syncytiotrophoblast is the outer layer of the placenta and the largest human cell, spanning an area about twice that of a king-sized bedsheet.

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.