Understanding the 21700 Lithium-Ion Battery: A Game Changer for ...

The lithium-ion battery has become a standout choice for a wide array of applications, from electric vehicles (EVs) to high-performance power tools. With a higher energy density, longer lifespan, and greater power output compared to its predecessor, the battery, the is reshaping the world of rechargeable batteries. This article delves into what makes the battery unique, why it’s preferred in modern devices, and its real-world applications.

Please visit our website for more information on this topic.

What is a Battery?

The battery is a lithium-ion rechargeable battery characterized by its cylindrical shape and dimensions of 21mm in diameter and 70mm in length. Unlike the smaller battery, the is larger, allowing it to store more energy. It is commonly used in high-demand devices that require more power, longer runtimes, and better overall efficiency.

Why Choose the Battery Over Other Options?

When comparing the to the , several key advantages become apparent. The typically offers between mAh to mAh capacity, significantly higher than the ’s range of mAh to mAh. This translates into a battery that can deliver more energy, making it ideal for devices that need longer power supplies without frequent recharging. With its higher energy density, the has a distinct edge, particularly in high-drain applications like electric vehicles.

Key Features of the Battery·

• Energy Density: One of the primary reasons for the battery’s growing popularity is its energy density. Offering approximately 20% more energy per unit volume than the , it can store more power in the same space, enhancing the performance of your devices.·
• Capacity: With an average capacity range of mAh to mAh, the is a powerhouse compared to smaller batteries. This makes it well-suited for both personal electronics and industrial uses.·
• Durability: Lithium-ion batteries, including the , are known for their long lifespan and resistance to the "memory effect," which allows them to retain their full charge capacity for many cycles without losing efficiency.

Common Applications of the Battery

The ’s high energy density and reliability make it versatile across various industries:·

• Electric Vehicles (EVs): Tesla, one of the most prominent adopters of batteries, uses them in their Model 3 vehicles, which significantly enhance their range and performance. These batteries provide a longer-lasting charge, meaning EV drivers can go further without needing to recharge as frequently.·
• Power Tools: The is increasingly being used in cordless power tools, providing builders and DIY enthusiasts with the power they need to complete long tasks without interruption.
• Consumer Electronics: From laptops to high-performance flashlights, the battery is favored for devices that need high-capacity and long-lasting batteries. Users experience less downtime due to longer runtimes and quicker recharging.

Charging and Maintenance

Charging a battery is relatively simple, but to maximize its lifespan, it's essential to follow proper practices. Always use a charger specifically designed for lithium-ion batteries, and avoid overcharging, which can degrade battery life. Most batteries take about 4 hours to fully charge, though this can vary depending on the charger’s output and the battery’s capacity.

You will get efficient and thoughtful service from SINC.

Store your battery in a cool, dry place to prevent any performance loss. Extreme temperatures can affect the battery’s efficiency, so be sure to avoid exposing it to high heat or freezing conditions.

Cost and Longevity

While batteries may cost more upfront than smaller counterparts like the , their longer lifespan and higher performance make them a worthy investment. On average, you can expect to pay between $7 to $28 for a battery, depending on the brand and specific features like protection circuits or higher capacity ratings.

With to recharge cycles, the can last for several years, making it a cost-effective choice in the long run. Proper care, such as not draining the battery completely and avoiding excessive charging, will also ensure it continues to perform well for a longer period.

Final Thoughts

The lithium-ion battery is undeniably a leap forward in energy storage technology. With its increased energy density, enhanced capacity, and diverse applications, it is the go-to battery for high-demand devices. Whether you’re powering an electric vehicle, a power tool, or your everyday electronics, the battery offers unmatched performance. While it may come with a higher price tag compared to older battery types, its efficiency, longer lifespan, and versatility make it a smart investment for both consumers and businesses alike.

If you want to learn more, please visit our website Type Li-ion Cells.

some google source:

"Can catch fire?
Is lithium battery electrolyte flammable?
Unfortunately, they are highly volatile and flammable and show flash points (FPs) around room temperature (between 16 and 33°C). In combination with an oxidant and an ignition source they can cause fires and explosions."

solid state battery soon?

I have nothing more to say..

Do you have had an experience with a fire?

Lipo cells being charged is very dangerous but cells using products that are following regulations and not has history of being tampered with or opened by a customer will have more safety build in to minimize a fire being started. However as the cells contain different liquids some, most I guess are less volatile and flammable than those who are.

Do you have had an experience with a fire?

Yes Sir, three cases. Soon I post some pics.

case #1 - onewheel XR fall into water , than removed from river. everything ok but with some water inside..
after 15minutes, the owner was ready to put into the trunk of a brad new sport Porsche cayenne.. than suddenly the onewheel went on crazy firee! porsche saved because onewheel not inside car, but at ground on flames.. a lucky case..
Imagine putting onewheel inside porche trunk at minute 10.. the owner closes car trunk and goes to a great sport drive. than a crazy fire starts at back of tha car.. what a movie... do insures cover lithium fires inside cars?
fortunately everyone safe and sport porsche ok 50miles on it, smells like new!
lithium fire is similar to oxygen feeded fire, very high temperatures. cause melted part of onewheel structure.. ++660Celsius??

case#2 one trotinete/patinete tube battery containing 30cells @ 30% charge level inside aluminium tube.
trying to open battery with a hammer and a screwdriver and happened one cell strike.. the tube went on crazy rocket fire mode, a lot of fire output 60cm long and a lot toxic smoke, I had to jump above fire flame to exit lab What a movie!!
after 10min tube seems ok.. ready to go outise for safety. but tube was gettin more and more hot. just one cell fire. 29cells left for the show..
tube drooped outside building, than after some time it started a rocket type flame, a lot of loud sound pfffff melody type, and similar to elon musk rockets.. just a lot of somke & fire 1,5 meter long but no thrust power.. just a flame thrower
it was just a 30% SOC battery.. imagine more scenario when charged at 100%

case#3 a person with x2 citycoco20Ah 67V batteries inside house. but one had a bms faulty no top cutting voltage and battery debalenced.. the person left it chargin with a 2A charger, and after some hours, guess?
one battery starts a crazy fire inside house!!
one battery crazy fire and shouts incandescent stuff and hit the other battery. but second battery only plastic case with melted spots. the fire starter battery all burned!! 2nd battery saved.
everything ok and a house black wall.. but everyone safe and wall painted again!

never trust unknow bms protection! another scary movie!

I have nothing more to say.
Thanks for your time reading this.

PS: Sorry my PT english Important to keep your home and workplace safe. No charging or storing of unknown customer batteries...

For me I like to have more than one safety parameter. One is the cell you use so a is OK for that matter in comparison to lithium Manganese Oxide I think is the most dangerous type. Also Samsung ICR 26F I guess is next on the dangerous level because of personal experience although not more than squirting liquid and heat.

The other safety parameter is controlled charging in a way. Walk in when you know the charge is done. Set it up so that your battery has a BMS that cuts' charging at a certain voltage level.

"Search results

• LiCoO2 (Lithium Cobalt Oxide – LCO)
• LiMn2O4 (Lithium Manganese Oxide – LMO)
• LiNiMnCoO2 (Lithium Nickel Manganese Cobalt Oxide – NMC)
• LiNiCoAlO 2 (Lithium Nickel Cobalt Aluminum Oxide – NCA)
• Li 2TiO 3 (Lithium Titanate – LTO)
• LiFePO4 (Lithium Iron Phosphate – LFP)"

I'd like a third safety measurment and its kinda to see your device when your walking around in the home or at work working. I got two at the moment but of course more is always welcome.

A third can be that the charger, of course does charge to the correct voltage level (as you can use a 36v charger to charge a 24v battery but that ain't the normal thing to do.

So then I kind of have three levels of safety build in to my charging already. I don't use wet extinguishers with lithium battery fires. That said, I've seen it argued, that the cooling effect of water can be useful despite the harm it otherwise causes. Like if you have a single cell or p-group undergoing thermal runaway, dunking and covering the pack in sand in a metal trash can is what I do. However, dunking in water is still going to keep the temperature down at the boiling point of water, 100 degrees, which is lower than the worst reactions, and will prevent the whole pack from undergoing thermal runaway.

I have tossed individual cells and old packs in water buckets outside to see what happens - I take apart used batteries pretty often, so I often have ones that are accidentally dented from prying the welds off and starting to heat up. The cell had to sit in water a day before it vented and shorted and turned the water black. The pack similarly didn't short immediately and I was able to transfer it to an old ammo can full of dirt. Theoretically that could be better in certain situations than letting it all burn up, one cell reaching thermal runaway, the heat from that triggering another cell, then eventually the whole battery.

Why isn't it just lithium + water = boom? Because we're not dealing with pure elemental lithium here. We're dealing with a lithium salt in a solvent. The lithium salt starts decomposing over 150 degrees:


Then for the solvent in my Samsung cells:


You can see both with and without the presence of water (which admittedly does make it happen earlier), the solvent starts to decompose over 100 degrees as well:


So if water is all you have, there could be some value in using it to help the temperature down, even if the presence of water makes the harmful chemical reactions somewhat worse.

Back on the original topic, I think you still pay a premium for cells vs. the same ah in . It used to be quite a difference but has been coming down. It's still more economical (last time I checked) to build with cells over for the same ah.

take this example:
Samsung 40T 35A mAh (€3.64 per unit without VAT pack 100)
vs
Samsung 35E mAh 7A (15A peak) (€3.26 unit without VAT pack 100)

# Samsung 40T
3,6Vx4Ah=14,4Wh cost 3.64eur equals 3,96Wh per euro

# Samsung 35E
3,6Vx3,5Ah=12,6Wh cost 3,26eur equals 3,87Wh per euro

soo we see cost less than for this specific comparative (almost same price per Wh)
but peak current is 15A for 35E vs 35A continuous(70A peak) for the Samsung 40T. Soo maybe 40T is a better option becaus for almost tha same price Wh per eur U get much more current peak output
also needs more area/volume for the same Wh compared to here we have some scientific study table.
some science in a table, but needs to add column price euro/dollar per Wh, per liter volume & per kilo
90% of cases what matters is tha final consumer price!

and also need table metric convertion to USA gallons, pounds etc..



conclusion: maybe is a winner or tryin to!
see energy density Wh per liter volume (dont know gallons)
is 670Wh per liter vs 684.2Wh per liter usin (Volume of 1 liter = 10 cm by 10 cm by 10 cm cube) (aprox. 4inch by 4inch by 4inch)

question to google:
What volume is 1 gallon? 231 cubic inches
(gal, U.S.) There are 231 cubic inches = 128 ounces = 8 pints = 4 quarts in a gallon. 1 gallon = 3.785 liters.07/02/
cubic square of 231 equals 6. inches. One gallon is a 15.58cm by 15.58cm by 15,58cm cube

sooo, for tha same volume. maybe wins at energy density (but we dont know tha price of that specific cells, so cost could be twice of a build..

PS: remember 99% of bms's have a low cut voltage at 2,7V or 3V. any cell energy bellow that is uselesss. soo capacity of cells could decrease from adverted value, because useless energy from 2,0V-2,7V window
maybe CO2 or liquid nitrogen to combat lithium fireworks?

google source:
"What puts out a lithium fire?"
google Talkin: "For best results dousing a lithium-ion fire, use a foam extinguisher, CO2, ABC dry chemical, powdered graphite, copper powder, or soda (sodium carbonate) as you would extinguish other combustible fires. Reserve the Class D extinguishers for lithium-metal fires only.21/03/"

or use the low cost fire stop method, usin beach sand..

table source:
ShieldSquare Captcha