The Surprising Truth Behind 9-Volt Batteries: A Deep Dive
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Chapter 1: Unveiling the 9-Volt Battery
Did you know that the rectangular 9-volt battery, often found in toys, is actually comprised of six smaller cylindrical 1.5-volt batteries? This intriguing detail was shared by a Reddit user named moochir, who linked to a Wikipedia article about 9-volt batteries on the r/todayilearned subreddit.
Moochir reminisced, “I discovered this when I was young and decided to open a dead 9-volt battery. Inside, I found six small batteries resembling AAA cells. It was both fascinating and odd.” The post quickly gained traction, leading to numerous comments where users shared their own insights and stories about batteries, including their tastes, applications, and replacement options.
Section 1.1: The Shape of 9-Volt Batteries
A frequent question raised was why 9-volt batteries have an unusual shape compared to other types. A Reddit user, u/PM_ME_UR_OBSIDIAN, who identified as an electrical engineer, provided an explanation rooted in history.
“The unusual shape is a result of historical necessity. Early transistor radios required more than 1.5 volts, prompting manufacturers to connect multiple batteries in series for higher voltage output,” u/PM_ME_UR_OBSIDIAN stated. This design, introduced by Eveready Battery Company in 1956, became the industry standard. The two metal contacts on one end of the battery create a snap connector, facilitating easy attachment and detachment.
Subsection 1.1.1: Variations in 9-Volt Batteries
However, some commenters noted that not all 9-volt batteries consist of six smaller cells. Variants like lithium or rechargeable batteries may have different internal arrangements and materials.
Additionally, suggestions arose about replacing 9-volt batteries with a series of four or six AAA batteries using a snap connector. This DIY approach, as described by John Kennedy, a writer for Popular Science, involves basic tools like electrical tape, wire cutters, and a soldering iron.
“You can create your own 9-volt battery pack inexpensively if you have some AAA batteries on hand. It’s straightforward and can save you time and money in an emergency,” Kennedy noted in his article.
While this DIY solution seems appealing, it carries safety risks, including potential overheating, short circuits, or fire hazards. Furthermore, AAA batteries typically have a lower capacity and a faster self-discharge rate compared to 9-volt batteries.
Section 1.2: Choosing the Right 9-Volt Battery
Selecting the appropriate 9-volt battery for your device hinges on understanding your requirements. As James Brains of Business Insider pointed out, “The ideal 9-volt batteries for your devices align with your specific needs and preferences. Whether you opt for a long-lasting lithium battery, a rechargeable nickel-metal hydride option, or a budget-friendly alkaline battery, there's a choice for everyone.”
Chapter 2: The Enduring Legacy of 9-Volt Batteries
Nine-volt batteries are remarkable not only for their shape but also for their longevity in the market. They are among the oldest battery types still utilized today, boasting a captivating history.
As Nathan Chandler, a writer for HowStuffWorks, reflected in his article, “Nine-volt batteries are unique not just because of their shape, but also due to their historical significance. They have been a staple for a long time, and their story is intriguing.”
The first video titled "WHAT'S inside a 9 volt (9 V) battery" explores the internal components of a 9-volt battery, shedding light on its construction and functionality.
The second video titled "9 Volt Battery Hack! You'll be Surprised" discusses creative hacks and alternative uses for 9-volt batteries, offering viewers practical insights.
Relevant articles:
- TIL that the rectangular 9-volt battery is made of 6 small cylindrical 1.5-volt batteries, Reddit, 8/27/2023
- How to make a 9-volt battery from AAA batteries, Popular Science, 8/27/2023
- The best 9-volt batteries for your devices in 2023, Business Insider, 8/24/2023
- Why do 9-volt batteries have a weird shape?, HowStuffWorks, 8/21/2023