The most common batteries are standard AA, AAA, and C batteries. These batteries are cheap and easy to use. Most stores sell them for under ten bucks. UM2 batteries fall under the category of standard-sized cylindrical batteries. They are a type of dry cell battery that are commonly used in low-drain applications such as toys, torches, musical instruments, radios, and doorbells. But, what are UM2 batteries precisely?
UM2 is now the outdated Japanese designation for the C-cell. Years before international standardization of designations, the C-batteries used to have various designations in different regions and countries, and they were known as UM2 in Japan.
We will discuss in detail the C-batteries, previously known as UM2. So let’s dive in!
The UM2 battery, aka C-cell in Japanese battery nomenclature, is a dry cell battery designed for low to medium-drain applications.
It can be used in musical instruments, flashlights, smart electric meters, and toys! And ANSI has termed it the “14” among other standard batteries too.
UM2/C-Battery Size
UM2 batteries are the same physical size: 50mm (1.97in) long and 26.2mm (1.03in) in diameter, regardless of voltage or capacity!
Why? So they’ll always fit into compatible devices and holders without fail, no matter which battery you choose for your project!
Features, Properties and Design
R14 batteries, otherwise known as C-batteries, belong to the dry cell group and are capable of operating in low moisture conditions, making them portable and perfect for use with low-power devices. Combining a carbon-zinc anode for high power density with a manganese dioxide cathode ensures great longevity even when not in use!
All UM2 models come equipped with paper inserted between grids to prevent electrolyte leakage while their operating temperatures sit somewhere within the 15–30°C range. In addition, you have access to both primary and rechargeable variants, so your R14 is always at the ready, no matter what tasks await!
Primary UM2 Batteries
The UM2 primary battery is a disposable, non-rechargeable option. With varying voltages and capacities, it has a diverse selection of chemistries such as lithium bromine chloride, lithium thionyl chloride, manganese dioxide, and nickel cadmium. The most common types are:
Alkaline C batteries
The UM2 alkaline battery is the world’s most widely used type of power source! Not only is it incredibly accessible and affordable, but its 1.5 volt nominal voltage also makes it an ideal option for your various backup or emergency lighting needs, as well as digital cameras, flashlights, and other handheld electronics.
Plus, with advanced engineering materials built to last over a long period of time without any leakage issues, you can count on the reliable quality that comes with choosing these specific batteries!
Lithium C batteries
Lithium batteries are the go-to choice of many consumers today, found in everyday products such as cell phones or digital cameras. Their advantage over alkaline counterparts lies in their double nominal voltage (3.6V) and improved resistance to heat; this often results in better longevity too—just check its mAh rating!
Despite being pricier than other alternatives, they deliver great value for money by performing at a higher level all around!
Rechargeable UM2 Batteries
Rechargeable batteries are an incredibly convenient and reliable option in the battery world! Their long run times, along with no damage or leak potential, make them a go-to. They come available in lithium polymer, lithium-ion, NiCad, and NiMH chemistries, allowing you to get the right power for your needs without overpaying for something more powerful than required.
The UM2 rechargeables don’t fit standard holders due to their nonstandard size, yet they’re extremely versatile when it comes to capacity and voltage choices! Plus, being able to be recharged up to 800x makes these cheaper options much longer lasting, so you save money as well as reduce wastage from throwaway models, giving them an edge that other batteries cannot beat!
Nickel Metal Hydride (NiMH battery)
Today, rechargeable NiMH C-standard-size batteries are hugely popular for use in digital cameras and other electronic gadgets. These power cells come with a voltage of 1.2 volts and deliver between 180 and 2000 cycles without fading out on you anytime soon!
However, its life depends greatly upon the period during which it is stored, whether in a hot or cold climate, as well as when it was first manufactured.
Nickel Cadmium
NiCad batteries are rechargeable Cs that pack a real punch. Ranging from 1.2 to 1.5 volts with an enormous capacity of 90–1300 mAh, they have an impressive shelf life of up to 25 years!
In addition, you can feel great knowing these environmentally friendly gems don’t include toxic chemicals in their electrolyte and, even if worn out, can be recycled or reused by anyone for virtually any project around the home or workplace. Store them in a cool, dry place whenever possible; this way, your NiCads will offer plenty of power every time without fail!
Safety Guidelines For UM2 Batteries
The UM2 batteries are specially crafted for optimal safety—low moisture content and built-in protection against overcharging, discharge, and short-circuiting. But that doesn’t mean you should be complacent with handling them; exercise caution to prevent any mishaps from occurring!
- The user must not touch the battery at all when it is in the process of being charged!
- Its casing and connectors are not to be tampered with either, so leave that part as-is within its designated container.
- Any damaged batteries should also be avoided; this includes any instance where they have been exposed to intense temperature conditions.
FAQs
Can You Recycle UM2 Batteries?
Absolutely! UM2 batteries are completely recyclable. Check with your local authorities for any disposal or recycling guidelines they have in place; it’ll ensure you’re taking all the necessary steps when disposing of your used-up cells.
Can you charge non-rechargeable batteries?
Unfortunately, no. Non-rechargeable batteries aren’t built to take charge after use and should be properly disposed of once drained out.
Are UM2 the best batteries?
That depends entirely on what type of device you’re using them for! Do some research into which size is best suited for that particular piece of tech, and then decide from there accordingly.
Conclusion
UM2 batteries are an affordable and convenient solution for low power requirements. It’s important to keep safety in mind though: avoid dropping the battery or leaving it out too long at hot or cold temperatures – otherwise, short-circuiting may occur that could lead to leaking! So when using UM2s, remember these few tips; you’ll be glad you did later.
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James is an engineer and a professional blogger. He has gained extensive experience over the years, handling all types of power projects. He loves to share his experiences with all things related to batteries, generators, and other power-related topics.
