Tesla 21-70 Battery Cell Specifications

Tesla 21-70 Battery Cell

After 18650 battery cells, Tesla 21-70 Battery Cell are some of the most common and widely used cells in the battery pack of electric cars, battery-powered construction equipment, portable power cutting/drilling tools, the emergency torch, flashlight, etc.

What is a 2170 battery?

To help you with the technical design of your product or device, we have compiled a list of every possible technical standard for a 21700 battery.

Tesla 21-70 Battery Cell Specifications

The cylindrical dimensions (21 mm in diameter by 70 mm in height) of the 21700 Li-ion batteries are the inspiration for the battery’s name. They are taller and wider than standard AA batteries and 18650 cells. They cannot replace standard cell sizes like AA, AAA, or 18650.

What are the specifications for a Tesla 21-70 battery cell?

Due to its high energy density and long lifespan (1000+ charge cycles), the 21700 battery type is often used in high-current draining devices that need recharging. Due to its increased energy density and power output, the 21700 Li-ion battery enables the production and use of cordless power tools such as portable drill machines, long-range electric cars, etc.

A short time ago, the idea of portable power tools in utility and construction, such as cutting and drilling instruments, was nothing more than a pipe dream.

It’s encouraging to see that 21-70 lithium batteries can compete with corded equipment and offer an alternative substitute in various settings by allowing for much longer periods of use between charges. This battery is widely used in the tech sector because of its high output current, energy capacity, and inherent safety.

Efficiency and Price of 21-70 Batteries

The energy density of 21700 batteries is higher than that of 18650 batteries. A comparison of the current disclosure of Tesla shows that under the present circumstances, the energy density of 21-70 battery systems is roughly 20% greater than the 250WH of the original 18650-300 Wh battery system. Similarly, the Panasonic lithium power test in monomer batteries shows that the 21,700 battery has a much greater bulk density than the 18650-cell monomer.

What are the cost and efficiency of 21-70 batteries?

21-70 was Tesla’s next-generation electric vehicle (EV) cell, a cylinder slightly larger than the 18650, measuring 21 millimeters by 70 millimeters and weighing approximately the same.

It worked similarly to a capacitor, where the capacitance (power) is increased by decreasing the spacing between the anode and cathode sheets, changing the dielectric to one of higher permittivity, and increasing the area of both the anode and may be charged to a maximum of 4.2 volts or discharged to a minimum of 2.5 volts.

The cost, however, is not just a little bigger container; it also includes increased heat resistance. The 2170s increased anode/cathode plate sizes created a longer route for the charge to travel, increasing resistance and leading to waste heat and a decrease in the battery’s ability to meet fast charging demands.

The Additional Power Of 21-70 Cells

More duration isn’t the only benefit of batteries like the Bosch Core18V, Milwaukee M18 High Output, and Metabo LiHD packs. They make their packs more efficient at cooling down and use better materials to construct them, reducing the resistance they encounter (ohms). The result is a battery with much more usable power.

Imagine Bosch as an example. The power output of their regular 18V batteries may reach up to 800 watts. They increased the power by 80% when they switched to Core18V, bringing the total output to 1440 watts. Various other manufacturers claim comparable power increases.

It allows them to make cordless versions of tools we would never have imagined possible even a decade ago. Many of these cordless models are now superior to their wired predecessors.

The ultimate result is not power tools. As 21700 lithium-ion battery cells become more widely available, we expect to see the introduction of cordless solutions for various outdoor power tools, including those used for lawn care and landscaping, inverters, and construction equipment.

Even though Tesla electric vehicles use the 2170 battery, it is not exclusive to them. 2170, usually written as 21700, is just another way of classifying common battery sizes like AA, AAA, and D.

Tesla employs a unique form of Panasonic’s 2170 developed for use in their EVs. The Model 3 and the Model Y used these unique 2170s before manufacturing was shifted to Texas.

Panasonic has kept many of the specifics (beyond the specifications stated above) of the Tesla 2170 battery a mystery since the battery’s manufacturing began in 2017. Because no one else except Tesla gets these unique Panasonic 2170s, both Tesla and Panasonic would be hesitant to release too much information about the battery to maintain a competitive advantage.

Important information concerning 2170’s history was provided by Tesla in 2018. The Panasonic-made Tesla 2170 batteries from the company’s Nevada Gigafactory are said to have the greatest energy density of any EV battery at the time of their introduction.

By decreasing the quantity of cobalt and increasing the amount of nickel in each battery pack, Tesla and Panasonic could produce the battery’s unique chemistry (all while maintaining peak thermal stability). According to Tesla and Panasonic, the 2170 has less cobalt than cells made by any other battery manufacturer.

Component typeBattery/ CellPower supply
Battery typeLi-ionTechnology
Capacity3500- 5600 mAhPer cell
Operating voltage2.5- 4.2 voltRange (std.)
Cutoff voltage2 – 2.5 voltsCheck respective datasheet
Charging voltage4.2v- 5v5-volt max
Output currentcheck C rating*
Various Specifications Datasheet

Compare 21-70 To The 4680. Which Battery Is Superior And Why?

Finally, the distinctions between the Tesla 2170 and the 4680 become quite evident. Compared to the 4680s, the 2170 batteries are less efficient, safe, and costly. While we have yet to learn a ton about the 4680s, we know that the Tesla 2170s will shortly be replaced with 4680-enabled Model Ys.

In conclusion, the 4680 is an outstanding power source. It can catapult the company to new heights if implemented throughout Tesla’s whole EV line-up. The 2170s are not, however, much worse than the 4680s. The leap from the 2170s to the 4680s is an inevitable one. Both batteries have a similar chemical composition but function and look differently.

Technical Specifications For The 21-70 Battery

The technical characteristics and standard verified output of the component or module are described in the datasheet specification. We have covered the 21700-battery datasheet, which describes a li-ion rechargeable cell produced by several different electronics manufacturers and distributed by the same.

There are various kinds of 21700 batteries, each with a unique current rating and capacity for retaining a charge. In addition, high-quality cell models from reputable manufacturers will feature a built-in overcharge prevention and short circuit protection circuit to shield the cell and the device from accidental harm.

Contrasting The Numbers: 21-70 And 4680

When you look beyond this superficial resemblance, you will see how many ways the 2170 and 4680 batteries vary. Compared to the 2170, the 4680 is bulkier, heavier, and has a higher mAh/cell rating. The discharge of 2170 is less than that of 3680, despite its greater nominal voltage.

  • Usage

In addition, 21-70 has been utilized in the Tesla Model 3 and the Tesla Model Y, while the 4680 has only been used to power the Tesla Model Ys assembled in Texas.

  • Production

While Panasonic has been providing Tesla with 2170, the company’s in-house production of the 4680 means that Panasonic will soon begin supplying Tesla with the part once it has been approved. However, strictly aesthetically, 2170 has tabs, whereas 4680 does not.

The Difference Between the 21-70 and the 4680

  • Manufacturing of the Tesla 21-70 and Tesla 4680 at Tesla Gigafactories is either already in progress or is planned by Panasonic.
  • While the ideas behind the 21-70 and 4680 batteries are common to Tesla, the company does have exclusive versions of these batteries that no one else makes.
  • The Tesla 4680 battery is much bigger and heavier than the Tesla 2170, yet both can store the same amount of energy.
  • Tesla uses various battery types, including the 2170 and the 4680. These include the 18650 and the prismatic battery types.
  • Tesla’s long-term goal is to power all its vehicles with the 4680 battery.
2170 Battery4680 Battery
Models Using the BatteryModel 3, Model YModel Y (Texas-made)
Type of Batterylithium-ionlithium-ion
Weight of Battery68g355g
Size of Battery21mm x 70mm46mm x 80mm
Battery SupplierPanasonicTesla, Panasonic
mAh Per Cell4800 mAh9000 mAh
Comparison between the two batteries


These lithium-ion cells are 2170 in size and are used in the battery. The Model 3 battery packs, which have a voltage of 350 volts (nominal, 400 volts maximum), consist of four longitudinal modules, each containing the groups (bricks). There are 2,976 total cells in the Standard Range variant, split up into 96 groups of 31.


How Do You Describe The Cells Used In Tesla Batteries?

Panasonic, namely the 1865 and 2170 types of cells using NCA chemistry, was Tesla’s principal battery source for a while. LG Energy Solution (2170-type cells with NCM chemistry) and CATL eventually entered the fray (prismatic LFP chemistry).

In What Does A 21700 Battery Consist?

A 21700 battery is a rechargeable lithium-ion cell used to power electronic gadgets, including flashlights and vaping equipment. The 21700 battery is called for its dimensions, like other lithium-ion cells, so that size and compatibility may be immediately identified. In precise terms, it is 21 mm in diameter and 70 mm in length.

How Much Energy Does A Tesla Battery Store?

To answer the question, “How many volts does a Tesla battery have?” we may say that the Model 3 and Model X have 350V, while the Model S has 375V, and the Model Y has 400V. The voltage of the batteries in hybrid electric vehicles may be anything from 100V to 300V.

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