Best 3.7V Batteries of 2025

Bonnie Salem Avatar
Bonnie Salem
Last Updated: Jan 15, 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

3.7V batteries are a popular choice for a wide range of electronic devices, from smartphones and tablets to cameras and portable speakers. These lithium-ion batteries offer a high energy density, making them long-lasting and efficient. They are also lightweight and compact, making them ideal for use in portable devices. 3.7V batteries come in various shapes and sizes, including cylindrical and prismatic, and can be recharged multiple times. They are a reliable and convenient power source for powering your favorite gadgets on-the-go.

At a Glance: Our Top Picks

CPZZ 18650 Rechargeable Battery Cover#TOP 1
CPZZ 18650 Rechargeable Battery
ftb score rating icon9.8
EEMB 3.7V 2000mAh Lipo Battery Pack Cover#TOP 2
EEMB 3.7V 2000mAh Lipo Battery Pack
ftb score rating icon9.7
XHDATA BL-5C 3.7V Battery Cover#TOP 3
XHDATA BL-5C 3.7V Battery
ftb score rating icon9.5

Top 10 3.7V Batteries

#TOP 1

CPZZ 18650 Rechargeable Battery

2pack
CPZZ 18650 Rechargeable Battery Cover
CPZZ 3.7volt 18650 Rechargeable Battery 3.7v Battery 18650 Rechargeable Battery Lithium 3.7 Volt Button top for flashlights and headlamp,Headlight etc (2pack-3.7v)
ftb score rating icon9.8
FTB Score

The CPZZ 18650 Battery is a versatile power source designed for various devices, including flashlights and cameras. Its compatibility makes it ideal for travel and outdoor activities, ensuring you have reliable power wherever you go. With a capacity of 9900mAh, this battery supports multiple charge cycles without losing efficiency, so you won’t have to change it often. Additionally, it features multiple safety protections against issues like overheating and short circuits, keeping both the battery and your devices secure. Remember to fully charge it before the first use for optimal performance.

What We Like
Widely compatible with devices
High capacity and low discharge
Multiple safety protections
Environmentally friendly design
#TOP 2

EEMB 3.7V 2000mAh Lipo Battery Pack

LP103454-PCM
EEMB 3.7V 2000mAh Lipo Battery Pack Cover
EEMB Lithium Polymer Battery 3.7V 2000mAh 103454 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device- Confirm Device & Connector Polarity Before Purchase
ftb score rating icon9.7
FTB Score

The EEMB 3.7V 2000mAh Lipo Battery Pack is a reliable and safe rechargeable battery with a PCM protection function, UN 38.3 compliance, and UL certification. It is suitable for Bluetooth speakers, dash cams, keyboards, Wi-Fi smart home systems, and more. Customers have noted that the polarity of the battery connector must match the device, and that the battery may need to be modified to fit certain products.

What We Like
Reverse polarity option available
Suitable for various projects
Compact size
Decent battery life expectation
What We Don't Like
Slightly larger than expected
Some swelling reported
#TOP 3

XHDATA BL-5C 3.7V Battery

5C-Black-2
black
2 Count (Pack of 1)
XHDATA BL-5C 3.7V Battery Cover
BL-5C 3.7V 1020mAh Rechargeable Battery Suitable for Household Radio with Current Protection 2 Pieces (Black)
ftb score rating icon9.5
FTB Score

The XHDATA BL-5C Battery offers a reliable power source for devices like radios, Bluetooth speakers, and cameras. With a capacity of 1020mAh and a voltage of 3.7V, this lithium-ion battery ensures long-lasting performance. Its built-in current protection keeps your devices safe from overcharging, discharging, and short circuits, giving you peace of mind. Made from environmentally friendly materials, it avoids harmful substances like mercury and lead. Additionally, being rechargeable, it promotes energy savings and reduces waste, making it a smart choice for eco-conscious users.

What We Like
Quick installation
Good battery life
Compatible with various devices
Affordable price
Comes partially charged
What We Don't Like
Potential safety concerns
Limited battery life comparison
#TOP 4

PAOWANG 18650 Rechargeable Battery

Button Top
Button Top
4 PACK
PAOWANG 18650 Rechargeable Battery Cover
PAOWANG 4 Pack 18650 Rechargeable Battery 3.7V 9900mAh Button Top Li-ion Batteries for Flashlights, Headlamps
ftb score rating icon9.4
FTB Score

The PAOWANG 18650 Battery is a versatile power source designed to meet various needs. With a voltage of 3.7V, it is perfect for devices like flashlights and headlamps. The battery's size, slightly larger than a standard AA, ensures compatibility with numerous gadgets. One standout feature is its low self-discharge capability, which allows it to retain 70% of its charge even after three years of inactivity. Additionally, the battery comes partially charged, so you can start using it right away, although it's best to fully charge it before the first use for optimal performance.

What We Like
Long-lasting performance
Good value for money
Reliable for various projects
Prompt delivery
What We Don't Like
Inconsistent lifespan reported
Some capacity claims questioned
#TOP 5

Yuntunele 18650 Rechargeable Battery

EB-BG530BBC
Blue
2 Pcs
Yuntunele 18650 Rechargeable Battery Cover
Yuntunele Replacement Battery 18650 Rechargeable 3.7V High Capacity 3500mAh Genuine18650 Battery Flat Top Battery for Headlamp, LED Flashlight Blue
ftb score rating icon9.2
FTB Score

The Yuntunele 18650 Battery is a high-capacity, rechargeable power source designed to enhance your electronic devices. With its compact size, it’s compatible with a variety of gadgets, from LED flashlights to remote controls. You can enjoy extended usage thanks to its ability to be recharged up to 1200 times without losing efficiency, which means you won’t have to frequently replace batteries. Additionally, the battery is equipped with multiple safety features to prevent overheating and short circuits, ensuring reliable performance. For best results, make sure to fully charge it before the first use and store it properly for longevity.

What We Like
Long-lasting performance
Works well in multiple devices
Good value for price
Includes protective case
What We Don't Like
Some batteries may not fit all devices
#TOP 6

MakerFocus 3.7V Lipo Battery 10000mAh

Yellow
MakerFocus 3.7V Lipo Battery 10000mAh Cover
MakerFocus 3.7V LiPo Battery 10000mAh Lithium Rechargeable Battery with Integrated Protective Board, Insulation Coating and PH2.0A Plug for Raspberry Pi UPS Board and Other
ftb score rating icon9.2
FTB Score

The MakerFocus 3.7V Lipo Battery 10000mAh Lithium Rechargeable Battery is a great choice for powering Raspberry Pi UPS boards. It has passed the MSDS test and the UN 38.3 test, ensuring its safety and reliability. It has a maximum operating current of 3A and a discharge rate of 1C. Customers have found it to be a great choice for powering their Raspberry Pi Zero W projects, solar powered arduino projects, and portable penetration testers.

What We Like
Good battery performance
Compatible with solar nodes
High capacity
Reliable brand
What We Don't Like
Polarity issues
Size might be too large
#TOP 7

Svenirven 18650 Rechargeable Battery

EB-BG900BBC
Blue
2 Pcs
Svenirven 18650 Rechargeable Battery Cover
Svenirven 18650 Rechargeable Battery 3.7Volt 18650 Button Top Battery 2 Pack 18650 Batteries for Headlamp LED Flashlight
ftb score rating icon9.2
FTB Score

The Svenirven 18650 Battery is a reliable power source for various devices. Measuring 67mm in length, this button top rechargeable battery is perfect for headlamps, toys, cameras, and more. It features multiple protections against short circuits and overcharging, ensuring your devices remain safe while in use. Additionally, the battery is certified by several safety standards, giving you peace of mind regarding its quality. Before purchasing, make sure to check if your device requires the 18650 model, as this battery is not compatible with flat top devices.

What We Like
Fast shipping
Exact size for flashlight
Good quality
Restores solar lights
Improved brightness
What We Don't Like
Charge does not last long
Requires frequent recharging
#TOP 8

DIDODI 3.7V 1100mAh Lipo Battery

DIDODI
DIDODI 3.7V 1100mAh Lipo Battery Cover
DIDODI 3.7V Lipo Battery 1100mAh 603449 3.7V Lithium Polymer Battery Rechargeable with JST Connector for Speaker and Dashcam
ftb score rating icon9.2
FTB Score

The DIDODI Lipo Battery is a reliable power source designed for various devices like Bluetooth speakers, dash cams, and digital cameras. It operates at a voltage of 3.7V and has a capacity of 1100mAh, ensuring your devices run smoothly. To maintain its performance, it's recommended to keep the battery charged between 40% and 60% during long-term storage. Additionally, this battery includes multiple safety features, such as protection against overcharging and short circuits, giving you peace of mind when using it. With over 800 cycles of life, it promises longevity for all your electronic needs.

What We Like
Perfect size
1100mAh capacity
Lightweight and compact
Reliable performance
Good for meshtastic devices
#TOP 9

Yuntunele 18650 Rechargeable Battery 3500mAh

EB-BG530BBC
Blue
2 PCS
Yuntunele 18650 Rechargeable Battery 3500mAh Cover
2 Pack 3.7 Volt 18650 Rechargeable Battery High Capacity 3500mAh Genuine18650 Battery Button Top Battery for Flashlight, Doorbells, Headlamps & More (Blue)…
ftb score rating icon9.1
FTB Score

The Yuntunele 18650 Battery is a versatile power source designed for various devices, including flashlights and headlamps. Its compact size makes it easy to use in different applications. You will appreciate the extended battery life, as it can be recharged up to 1200 times without losing efficiency. Built with multiple layers of protection, this battery ensures safety against overheating and short circuits, giving you peace of mind. Plus, it’s compatible with a wide range of gadgets, making it a convenient choice for all your electronic needs.

What We Like
High capacity 3500mAh
Rechargeable up to 1200 times
Multiple safety features
Compatible with various devices
#TOP 10

AFSONGOO 18650 Rechargeable Battery

B800BC
Blue
2Pack
AFSONGOO 18650 Rechargeable Battery Cover
AFSONGOO 3.7 Volt 18650 Rechargeable Battery 18650 Battery 2Pack Large Capacity 3400mAh 18650 Batteries for Headlamp,LED Flashlight,Mini Fans etc (Flat Top)
ftb score rating icon8.9
FTB Score

The AFSONGOO 18650 Battery is designed to meet your power needs with its large 3400mAh capacity. This battery is compatible with a variety of devices, from LED flashlights to portable fans, ensuring you have reliable power wherever you go. Its advanced smart cell technology enhances efficiency, providing you with longer usage times. Additionally, the battery is backed by safety certifications, giving you peace of mind while using it. With built-in protection against overcharging and overheating, you can trust that your devices will remain safe and functional.

What We Like
Long-lasting performance
Compatible with multiple devices
Easy installation and use
Good packaging
What We Don't Like
One battery drains faster
Some difficulties with initial charging
Buying Guide Image

Factors to Consider when Choosing 3.7V Batteries

Battery Chemistry

One crucial factor to consider when choosing 3.7V batteries is the battery chemistry. Common options include lithium-ion (Li-ion) and lithium-polymer (LiPo) batteries. Li-ion batteries are known for their high energy density and long lifespan, while LiPo batteries are lightweight and offer higher discharge rates.

Capacity

The capacity of a battery refers to the amount of energy it can store. Look for 3.7V batteries with a higher capacity, measured in milliampere-hours (mAh). A higher capacity means the battery can power your devices for a longer time before needing a recharge.

Voltage Stability

Another important factor is voltage stability. Ensure that the 3.7V batteries you choose offer consistent voltage output throughout their discharge cycle. This stability is crucial to prevent damage to your devices and ensure optimal performance.

Safety Features

Safety should be a top priority when selecting 3.7V batteries. Look for batteries that have built-in safety features like overcharge protection, over-discharge protection, short-circuit protection, and temperature control. These features help prevent accidents, such as overheating or explosions.

Brand Reputation

Consider the reputation of the battery brand you are considering. Look for brands with a track record of producing high-quality and reliable batteries. A reputable brand is more likely to provide batteries that meet safety standards and deliver consistent performance.

Frequently Asked Questions (FAQs)

1. Are 3.7 V batteries the same as AA?

No, 3.7V batteries and AA batteries are not the same. 3.7V batteries are lithium batteries, while AA batteries are typically 1.5V. The 3.7V battery has a higher average voltage throughout its life compared to the 1.5V AA battery. Although they may look similar in size, they differ in chemistry and voltage.

2. What are 3.7 V batteries used for?

3.7V batteries, specifically the 18650 rechargeable battery, are commonly used in devices like flashlights, cameras, LED clocks, portable speakers, and fans. They are also used to build battery packs and power banks found in laptops. These batteries provide a reliable power source for various electronic devices.

3. Can I use 18650 instead of AA?

No, you cannot use an 18650 battery instead of an AA battery. These batteries have different sizes and discharge performances. While 18650 batteries have various lithium chemistries, AA batteries have their own chemistries. It is important to use the correct battery type specified for your device.

4. How long does a 3.7 volt battery last?

A 3.7 volt lithium battery, such as the 18650 battery, can have a remarkable service life when stored at its rated voltage. It can last up to 10 years with minimal loss in capacity. The longevity of the battery will also depend on usage and other factors.

5. Can I use a 4.2 V battery instead of a 3.7 V battery?

Yes, a battery with a nominal voltage of 3.7V can be used instead of a battery with a limit voltage of 4.2V. The rated voltage of a lithium battery is 3.7V, and its upper limit voltage for charging is 4.2V. As long as the size and capacity are the same, a 3.7V battery can be used as a replacement for a 4.2V battery.

Editor's Notes

During our 3.7v battery research, we found 24 3.7v battery products and shortlisted 10 quality products. We collected and analyzed 21,743 customer reviews through our big data system to write the 3.7v batteries list. We found that most customers choose 3.7v batteries with an average price of $15.86.

The 3.7v batteries are available for purchase. We have researched hundreds of brands and picked the top brands of 3.7v batteries, including CPZZ, EEMB, XHDATA, PAOWANG, Yuntunele. The seller of top 1 product has received honest feedback from 181 consumers with an average rating of 4.5.

Written by
Bonnie Salem Avatar

Bonnie Salem is a stay-at-home mother with two-year-old twins and has spent almost half of her life surrounded by baby products. As a mother and a professional copywriter, she has an insightful and unique eye for researching products suitable for infants. Bonnie Salem is an expert in health and nutrition who lives with her family in New Jersey. She has over 15 years of working experience in an institute of medicine after graduating from the University of Toronto. She is highly interested in personal health and wellness.

3.7V Batteries Comparison Table

#TOP1
CPZZ 18650 Rechargeable Battery Cover
#TOP2
EEMB 3.7V 2000mAh Lipo Battery Pack Cover
#TOP3
XHDATA BL-5C 3.7V Battery Cover
#TOP4
PAOWANG 18650 Rechargeable Battery Cover
#TOP5
Yuntunele 18650 Rechargeable Battery Cover
#TOP6
MakerFocus 3.7V Lipo Battery 10000mAh Cover
#TOP7
Svenirven 18650 Rechargeable Battery Cover
#TOP8
DIDODI 3.7V 1100mAh Lipo Battery Cover
#TOP9
Yuntunele 18650 Rechargeable Battery 3500mAh Cover
#TOP10
AFSONGOO 18650 Rechargeable Battery Cover
BrandCPZZEEMBXHDATAPAOWANGYuntuneleMakerFocusSvenirvenDIDODIYuntuneleAFSONGOO
Recommended Uses For ProductIndoor/OutdoorIndoor/Outdoor-Indoor/OutdoorRemote Controls, Flashlights RCA, ToyRAKwireless WisBlock Meshtastic Starter Kit, Raspberry Pi UPS BoardFlashlightsIndoor/OutdoorPhonePhone
Item Weight2.39 ounces1.76 ounces1.41 ounces5 ounces3.84 ounces5.9 ounces-1.44 ounces3.84 ounces-
Battery Cell CompositionLithiumPolymerLithium Ion--Lithium IonLithium IonLithium PolymerLithium IonLithium Ion
Unit Count2.0 Count1 Count-1.0 Count1.0 Count1 Count1 Count1.0 Count1.0 Count-
Number of Batteries-1 Lithium Polymer batteries required. (included)2 Lithium Metal batteries required. (included)--1 Lithium Ion batteries required. (included)-1 Lithium Polymer batteries required. (included)-1 9V batteries required.
FTB Score
ftb score rating icon9.8
ftb score rating icon9.7
ftb score rating icon9.5
ftb score rating icon9.4
ftb score rating icon9.2
ftb score rating icon9.2
ftb score rating icon9.2
ftb score rating icon9.2
ftb score rating icon9.1
ftb score rating icon8.9
Where to Buy