20700 batteries are larger than 18650 cells in both size and capacity and are known for their long-lasting duration. 20700s are a new class of battery that recently emerged, with the 21700 as the successor to the ever-popular 18650 battery. The cell is so-called because of its measurements – 20mm in diameter and 70mm in length, like the other batteries in the 600 and 700 class.
Jeffrey BuckleyUpdated: March 13, 2023
Hohm Tech Sherlock 20700
30.7 amp discharge rate
40.6 amp max discharge rate
These flat-top cells from Hohm Tech are the perfect companions for a vaper.
They have over 3,000 mah per cell and are made to power...
These flat-top cells from Hohm Tech are the perfect companions for a vaper.
They have over 3,000 mah per cell and are made to power devices that consume much power. These include high-wattage vapes.
Vapers who buy these batteries will get very dependable and long-lasting cells.
Do you need some batteries that can be recharged hundreds of times?
These batteries can be charged up to 800 times before they can no longer hold a charge. So with a pair of these in a vape, users can be entirely sure they will get plenty of vaping time and prolonged use from their batteries.
Also, these batteries are tested to ensure they will not leak or explode under extreme conditions.
#3 Vapcell NCR 20700
Warranty Protected Batteries
These 3200 mah batteries are proven to last several hours, making them perfect for people who like using high-wattage vapes with super-low resistance coils.
Additionally, these batteries are covered by a warranty. They are valid for refund up to 45 days after being purchased. They can also be replaced within six months.
#4 Vapcell NCR 20700 Rechargeable Li-Ion Battery
16A Continuous Discharge in a Wrapped Cell
The Vapecell NCR 20700 is a long-lasting cell with its 4200mAh capacity and continuous discharge rate of 16A. The cell is fully-wrapped and comes with a safety chip that offers protections like over-charge and short protection. The cell can output a nominal voltage of 3.7V and has a flat-top design.
Reasons to Get This:
You want a spare 20700 battery in your line-up
You have 20700 vaping devices
You want to try a battery other than the 18650
Keeps charges longer than others
Safety features included
Wraps are too fragile
#5 Basen INR 20700 Rechargeable Li-Ion Battery
Powerful Cells with High-Capacity Charges
The Basen INR 20700 cell has a long-lasting capacity of 3100mAh. And it features a standard nominal voltage of 3.7V. The cell is fully-wrapped and protected and features a flat-top design. The battery is also a 20700 model and can be used in any compatible vaping device. The Basen also features a long-lasting charge and can go for up to 1000 recharge cycles.
Reasons to Get This:
You have a compatible 20700 device
You want a spare pack of batteries
You want to try something new
Can take a lot of recharge cycles
Wrapped and protected
Does keep charges for long
#6 20700/21700 Protective Battery Case
A protective battery case for 20700/21700 batteries is a small container designed to hold one or more 20700 or 21700 rechargeable batteries used in electronic devices like flashlights, vaping devices, and other portable electronics. The case is made of durable materials such as plastic, silicone, or rubber, which protect the batteries from damage due to impacts, scratches, or other external factors.
Handy accessory for anyone who uses rechargeable batterie
Batteries are essential elements for any vape mod’s smooth and safe operation.
The 18650 battery was the most common cell on the market when vapes started emerging.
Single-cell devices were the norm, but vapers wanted more power, so vape makers started making dual, triple, and even quad 18650 battery devices.
With 20700 and 21700 cells, a single battery is enough to power a high-wattage, high-drain device, whether regulated or unregulated.
Of course, these new battery types won’t work in those 18650 devices. Still, manufacturers have started to build mods around the parameters of the original cell type while also including adapters so users can install their 18650 batteries.
How To Choose the Best 20700 Battery
Choosing the right battery for your rig is something only sub-ohm or mech mod vapers need to worry about. This is because these are the only devices with removable cells requiring a lot of juice to work. Other vapes like pod mods or AIOs do not have those concerns, as the battery you get in the device is the only one you get.
Important specifications to check:
The manufacturer is another important consideration. While most brands make safe, reliable cells, a battery can be wrapped or rewrapped means that some vendors can take low-quality, malfunctioning cells and cover them, so they look like new. Always buy from trusted vendors that have a good reputation.
What’s the Difference Between the Batteries?
18650s vs. 20700s
The 18650 class of batteries became the backbone of early high-wattage vaping devices and have remained popular ever since. They are popular because of their long-lasting designs, nominal voltage outputs, and versatility. 18650s batteries are also found in many popular electronics and accessories, so their use is universal.
20700 batteries are similar in design to 18650s but are longer and wider, so they have more room for larger charges. The battery capacities of 18650 and 20700 cells are often between 3500 and 4500mAh, but they vary between manufacturers. The 20700 cell is also commonly found in everyday electronic devices because of its larger capacity and staying power.
21700s vs. 20700s
The 21700 cell is larger than the 20700 and 18650, therefore offering longer-lasting charges to any compatible device. The great thing about the 21700 cells is that it does the work of two 18650 cells, which means that vape manufacturers can make lighter, more portable devices without compromising power output.
The 20700 offers the same output, so they are interchangeable among different devices. Some next-generation vaping devices are even designed to work with both types of cells as they are very similar in design and functionality. Some devices even accommodate all three types of cells – 18650, 20700, and 21700 – given that they are all popular among vapers.
FAQ about 20700s
Are 20700 batteries safe?
Yes, these batteries are safe. However, there are precautions to take when using any battery. Do not use batteries with damaged wraps or that are warped or discolored. If they show these signs, throw them away in a designated place for discarded batteries and get a new one.
How long to charge 20700 battery?
Charging time for a cell like this depends on many factors, like the battery’s capacity and the amperage of the charger you are using.
For a cell with a capacity of 2500mAh and a charger that charges at 500mA/hour, charging time can take about three hours.
How long does a 20700 battery last?
A fully-charged 20700 cell can have various durations depending on usage. A single cell in an unregulated mech mod can last for a few hours with heavy use or last all day with light to moderate use.
How do you rewrap a vape battery?
A cell may need a new wrap if the original covering has a tear or other damage. This is dangerous given that the battery body may come in contact with a metal object, which can lead to a short.
Rewrapping a cell is not complicated and requires the following:
New battery wraps (PVC in sheet form or pre-rolled)
A heat source (usually a hairdryer will suffice)
First, remove the original wrapping with their tweezers; if they have pre-rolled tubes, they can slip it onto the cell.
Once it is in place, users can blow hot air over the entirety of the battery so it sticks to the body.
Only apply as much heat as you need.
Using too much heat can melt the wrap. Before you meld the cover to the battery body, you can place an insulator on one end to keep the battery from leaking.
How many amps does a 20700 vape battery have?
Calculating the amperage of a battery can take many forms. You can use Ohm’s Law to determine the amperage you are drawing from a cell by using a formula with variables like:
To get the amperage of the cell, plug in the resistance of your coil and the voltage coming off of the battery, which will give you the amperage.
Every 20700 battery has a nominal voltage written on the wrap. An IJoy battery, for example, can put out 40Amps.
For a sub-ohm coil build of around 0.5ohms, you can use the formula:
I = V/R
To find out the amps that the cell is outputting, by inputting both the resistance and the voltage you are vaping at, which, for this example, can be 10.5V, which would give you 10.5/0.5=21A.
Where can I get a battery charger that works with IJoy 20700?
You can buy a charger for your IJoy 20700 batteries directly from IJoy, as well as any reputable vape supply store or online retailer.
How low can you build with a 20700 battery?
The lowest resistance possible to use in conjunction with a 21700 battery depends on what Ohm’s law says for unregulated mods.
Regulated mods use a different formula. Watts’ law determines how low a build can be in terms of wattage.
If variables like the amperage and voltage, you can also use Ohm’s law to calculate the appropriate resistance for your builds.
What is the continuous output on an Ijoy 20700 battery?
For an IJoy battery with a max discharge current of 20A and a low-voltage output of 3.7V, the cell can match the high-wattage output of the attached mod. A 220W mod, for example, can output 3.7V but not for long as the battery will lose power immediately, even after only a few puffs.
When using a high-wattage, high-drain device, it is best to vape at lower wattages to conserve battery power and not overtax the battery.
A 20700 battery with a continuous discharge of 40A can output for an extended period, even within the 65-80W range.
How many volts does a 20700 battery put on mech mod?
A 20700 cell has a working voltage range between 2.75V and 4.2V, which lowers after the device is used.
A typical 20700 battery has a nominal or average voltage output of 3.7V, much like the cells listed here.
What is the best 20700 battery?
There are many variations of battery brands, but the most trusted brands – the brands that manufacture their proprietary batteries rather than re-wrap cells from battery makers – are LG, Samsung, and Sony.
Other brands take these batteries and wrap them in their label, which is a common practice, but make sure they come from a reputable site that sells authentic batteries, not knock-offs.
Can I Use 20700 Vape Batteries Instead of 18650s?
It depends on the device. For example, some vapes that use the 18650s are compatible with 20700 and 21700s. Read the specifications to make sure the device is compatible with both batteries.
Have you used a 20700 mod, regulated or unregulated? Have you noticed a difference between dual or triple 18650 devices and a single 20700 mod? Tell us what you think in the comments section below.
20700 batteries are relatively new in vaping, but they seem to be the way of the future. The simple reason is that you can get more – power, performance, and battery life – from a single 20700 cell than two or three or four 18650 cells. This energy efficiency also means that users can vape on smaller and more portable, high-powered mods than the traditional and hefty triple-18650 device.
Published: March 20, 2020Updated: March 13, 2023
I was a smoker for over 25 years. In this time I also earned my medical degree with a specialization in addiction treatment and counseling. That period has led me to vaping, my interest started around 2011. I’m fighting the tide of hysteria and dis-information around vaping that emanates from various fronts legislative, cultural and scientific. Having scientific councils support, I’m happy to contribute my thoughts, articles, and expertise.