Best 21700 Battery Chargers (2022): Reviews & Comparison

21700 batteries are one of the newest battery technologies on the market. These powerful little cells offer a high discharge rate and capacity, making them ideal for use in high-performance devices such as vape mods and flashlights. However, finding a good charger for 21700 batteries can be a challenge. There are plenty of 21700 chargers on the market, and not all of them are created equal. In this article, we'll take a look at some of the best 21700 battery chargers available today. We'll also provide a few tips on how to choose the right charger for your needs.

Fenix Single Channel Smart Battery Charger

This battery charger from Fenix is perfect for keeping your rechargeable batteries powered up and ready to go. It supports different types and sizes of batteries and has a high-definition LCD screen that displays the charging, discharging, and battery status. Plus, it features Micro USB charging and USB discharging, so you can keep your other devices charged as well.

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What are 21700 batteries and their uses?

21700 batteries are a new development in battery technology. They are lithium-ion rechargeable batteries that are slightly larger than AA batteries.

21700 batteries are perfect for high-drain devices such as vaporizers and mods. They have a much longer lifespan than other types of batteries, and they can handle more intense loads without overheating.

If you're looking for a battery that can provide superior performance and extended life, then 21700s are the way to go.

How to choose the best 21700 battery charger?

There are a lot of 21700 battery chargers on the market, but not all of them are created equal. Some chargers are better than others, and some can even damage your batteries. So which one should you choose?

When it comes to safety, you'll want to make sure that the charger you choose has built-in safeguards against overcharging, overheating, and short-circuiting. You should also look for a charger with CE and RoHS certification, which means that it meets international safety standards.

As far as performance goes, the charging speed is one of the most important factors to consider. Many chargers on the market today offer fast-charging capabilities, so you'll want to find one that can charge your batteries quickly without damaging them. Additionally, you'll want to make sure that the charger you choose can accommodate the capacity of your batteries. Some chargers are only compatible with smaller capacity batteries, while others can handle larger ones.

To sum it up, when choosing the best 21700 battery charger, be sure to consider both performance and safety features to find the perfect option for your needs. Review user feedback to get an idea of which products are well-made and safe, and then consider the charging speed and capacity of each charger to find the one that best suits your needs. With so many great options on the market today, you're sure to find the perfect charger for your needs.

Which are the best 21700 battery chargers?

The best 21700 battery chargers are those that are efficient, reliable, and have a long lifespan. To help you find the best option, here is a list of the top chargers on the market.

Best Single Slot Charger - Fenix Smart Battery Charger

The Fenix Smart Battery Charger is a great option for those looking for a reliable and efficient single slot charger. It is able to charge 21700 batteries quickly and safely and has a wide range of safety features to protect your batteries, such as overcharge protection, short circuit protection, and reverse polarity protection.

This battery charger is perfect for keeping your rechargeable batteries powered up and ready to go. The charger supports Li-ion, Ni-MH, and Ni-Cd batteries, so it's perfect for any type of battery. The high-definition LCD screen clearly displays the charging, discharging, and battery status, so you always know what's going on with your batteries. Plus, the Micro USB charging and USB discharging keep your other devices charged up and ready to go.

Fenix Single Channel Smart Battery Charger

This battery charger from Fenix is perfect for keeping your rechargeable batteries powered up and ready to go. It supports different types and sizes of batteries and has a high-definition LCD screen that displays the charging, discharging, and battery status. Plus, it features Micro USB charging and USB discharging, so you can keep your other devices charged as well.

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Best Dual Slot Charger - NITECORE UMS2 Quick Battery Charger

This dual-slot battery charger from NITECORE is another fantastic option for those with 21700 batteries. It is a universal smart charger compatible with almost all cylindrical rechargeable batteries, thus eliminating the need to own several chargers. The NITECORE UMS2 is able to charge different sizes and types of batteries at the same time. Each slot monitors and charges independently, automatically detecting Li-ion, Ni-MH, and Ni-Cd rechargeable batteries, including common batteries such as 16340, 14500, 18650, 20700, AA, AAA, batteries, and more.

It also features an LCD screen that displays important information such as battery health and charging current, so you can keep an eye on the status of your batteries as they charge.

This charger is also very safe to use with features like over-charging protection, short circuit protection, and more. Overall, the NITECORE UMS2 is a great choice for those looking for a reliable and affordable dual-slot charger for their 21700 batteries.

NITECORE Dual-Slot Quick Battery Charger

The NITECORE battery charger is a fast and efficient charger for 21700 batteries, including 16340, 14500, 18650, 20700, AA, AAA batteries. The LCD display shows the battery health and charging status, while the LumenTac battery organizer included in this kit helps you stay organized when you're on the go.

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Best Four Slot Charger - NITECORE UMS4 Quick Battery Charger

If you are looking for a four-slot charger that can accommodate 21700 batteries, then the NITECORE UMS4 is a great option. This battery charger is perfect for charging Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 AA AAA and more batteries. It has a built-in technology that automatically detects the battery type and selects the most appropriate charging mode. The charger also has reverse polarity protection and short circuit protection.

This charger can charge your batteries faster with its intelligent, quick charging technology. Additionally, the LCD screen on the charger will keep you updated on the charging status of each battery, so you can be sure that your batteries are being charged correctly.

NITECORE UMS4 Four Slot Battery Charger

This battery charger is perfect for charging Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 batteries. The built-in microcomputer controls the charging process, ensuring your batteries are charged safely and quickly. The included LumenTac QC3.0 Charging Adapter allows you to charge your batteries even faster.

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Best Eight Slot Charger - MiBOXER 8-Bay Smart Charger

MiBOXER 8-Bay Smart Charger is a professional charging station that can charge Ni-MH / NiCd / Li-ion / LiFePO4 batteries simultaneously. It features multi-protection, safety, and intelligent identification of battery type. Its multiple protections like overcharge protection, short circuit protection, and reverse polarity protection will protect your devices from any damage.

The built LCD display is another great feature of this charger as it will show you the charging status and current of each slot. If a battery is damaged, the LCD screen will display an error and cease to charge.

This charger might be an expensive option, but it's definitely worth the investment if you are looking for a reliable and safe charger that can charge 8 batteries at the same time.

MiBOXER 8-Bay Smart Charger

MiBOXER 8-Bay Smart Charger is a smart and powerful charger for your digital devices. With its advanced technology, it can automatically identify the power of your battery and charge it with the right current. If the battery is over-discharged, the smart charger can even activate this battery. If it is damaged, the LCD display will show an error and stop charging. This fast-charging device has eight bays to store up to eight batteries at one time! You don’t have to wait for them to charge; just swap out dead ones with charged ones while you are still using your devices. This is the best way to keep your digital devices running all day long.

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Can you charge 21700 batteries in an 18650 charger?

You can charge 21700 batteries in an 18650 charger. The 18650 chargers will recognize the larger battery size and adjust their charging parameters accordingly. However, it's important to note that not all 18650 chargers are capable of charging 21700 batteries. You'll need to make sure the charger you're using is specifically designed for 21700 cells.

How long does 21700 take to charge?

It depends on the charger. A standard 2 amp charger will take about 4-5 hours to charge a 21700 battery. However, using a high-output charger, like the Nitecore Intellicharger, can cut that time down to around 2 hours.

Conclusion

Finding the best 21700 battery charger can be a challenge. With so many different types and brands on the market, it's important to find one that meets your needs and budget. We hope our list of the best 21700 battery chargers has helped you narrow down your search.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.