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20 Best 3.7 V 4000Mah Battery of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best 3.7 V 4000Mah Battery of 2023. Check our ranking below.

2,377 Reviews Scanned

Rank No. #1

2pcs 1￵8￵6￵50 Rechargeable Batter￵y 4000mAh W￵i￵th 18650 Battery Charger,2 Bay Universal Charger Tool for 18650 Rechargeable 3.7V Li-ion Batteries

You Will Get: 1 x 2 slots smart battery wall charger, 2 button top b￵atte￵ries.
Charging Indicator: When the indicator is RED, it means charging; when it's GREEN, it means full cha￵￵rged; make sure you put the battery in position and it contacts with charger.
Wide Compatibility: Battery charger tool compatible for high power devices, such as headlamp, flashlight, radio, cameras, doorbells, LED lights, solar lights, toys, small fans, RC car, headlights, etc.

Rank No. #2

MakerHawk 3.7V 4000mAh LiPo Battery Rechargeable 1S 3C 124065 Lithium Polymer Battery with Protection Board Insulated Rubber Tape, Micro JST 1.25 Plug for Arduino ESP32 Development Board (1 Pack)

MakerHawk adopts a brand-new A-grade lithium cobalt oxide battery system, which, compared to ternary system batteries, not only provides higher energy and higher density but also ensures more stable discharge performance and longer lifespan. It also complies with UN 38.3 standards certification, ensuring safety and reliability.
Over-Discharge Protection: When the battery is about to deplete, and the voltage drops to 3.0V, the protection circuit will shut down, preventing further discharge and providing over-discharge protection.
Over-Charge Protection: During battery charging, when the voltage reaches the maximum battery voltage (4.2V), the protection circuit will automatically cut off power, indicating that the battery is fully charged and providing over-charge protection.
Short Circuit Protection: In the event of a short circuit, the protection circuit will automatically shut down within milliseconds and will not power on again. Note that if the battery is short-circuited (bypassing the protection circuit), the protection circuit may also fail due to prolonged high current or component overheating.
Storage & Usage: During long-term storage, keep the battery charged between 40% and 60%. We recommend charging the battery once every 3 months after receiving it, maintaining a voltage of 3.7-4.0V. Store the battery in a cool, dry place.

SaleRank No. #3

4 Pack 3.7 Volt Button Top Rechargeable Batteries and 18650 Battery Charger,Lithium Battery 4000mAh for Flashlights, Headlamps, Doorbells, RC Cars,Outdoor Garden Lights（Battery and Charger）

YOU WILL GET: 4 B￵UT￵TO￵N T￵OP B￵ATTE￵RIES and Universal Charger
【Wide Compatibility】Compatible with flashlights,headlamps, doorbells, small fans, digital cameras, children's toys, radios, speakers, Camcorders. Helps you wake up your devices quickly.

Rank No. #4

Qimoo 606090 3.7V Lipo Battery 4000mAh 606090 Rechargeable Lithium Polymer Battery Pack with JST PH2.0mm Connector for Electronic Device

[Note]- 3.7v lipo battery connector type is JST PH2.0MM !!!! - Please make sure the connector type and battery size match your device before purchase.
[Connector Specifications]-3.7v battery Connector Type: PH 2.0mm;; Cable Length: 5cm / 2"; Please check the battery polarity before installation, if the connector polarity is not matched with your device, it will damage the device or new battery.
[Battery Specifications] - 606090 li-ion battery Size: 6 x 60 x 90mm / 0.24" x 2.36" x 3.59" (H*W*L), Voltage: 3.7 volts, Maximum Charging Voltage 4.25v; Capacity: 4000mAh; Material: Lithium Polymer. Net weight: 75g.
[Applications]- 3.7v lithiun Polymer battery is suitable for MP3/MP4, Bluetooth wireless headset, GPS, baby monitor, game console, skype, smart watch, surveillance device, POS, car recorder, mobile power, Bluetooth speaker, VR glasses, beauty device, pet tracker, ring visual doorbell, etc.
Please use the battery correctly: 3.7v lithium batteries can not be used for high-current power devices, such as drones, miniature remote control helicopters, model airplanes, electric toys, etc.

Rank No. #5

(2-Pack) 3.7V 4000mAh Li-ion Rechargeable Battery with Wire JST PH2.54/2P Connector for DIY Electronics Toys Lighting Equipment

HIGH CAPACITY RECHARGEABLE BATTERY: 3.7V 4000mAh lithium-ion battery pack provides extended usage for your electronics and DIY projects.
COMPATIBLE WITH MULTIPLE DEVICES: Ideal replacement or upgrade for DIY electronics, toys, lighting equipment, and small devices requiring JST PH2.54/2P connector.
BATTERY SPECIFICATIONS: Voltage: 3.7V; Capacity: 4000mAh; Dimensions: 4.57" x 0.84" x 0.74"; Weight: 3.16 oz; Connector: JST PH2.54/2P.
BUILT-IN SAFETY PROTECTION: Features protection from overcharge, over-discharge, overcurrent, and short circuits for safe operation and longer battery life.
What You Get: 2 x Battery Pack [Rechargeable] and 24-Month Worry-Free Warranty and Smile Customer Service.

Last update on 2025-07-05 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best 3.7 V 4000Mah Battery?

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Romance University has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for 3.7 V 4000Mah Battery that you consider buying. Your questions might include the following:

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Potential sources can include buying guides for 3.7 V 4000Mah Battery, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible 3.7 V 4000Mah Battery. Make sure that you are only using trustworthy and credible websites and sources.

Romance University provides an 3.7 V 4000Mah Battery buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available 3.7 V 4000Mah Battery currently available on the market.

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Brand Value: Every brand of 3.7 V 4000Mah Battery has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an 3.7 V 4000Mah Battery?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your 3.7 V 4000Mah Battery.
Customer Ratings: Number ratings grade 3.7 V 4000Mah Battery objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 3.7 V 4000Mah Battery.
Product Quality: You don’t always get what you pay for with an 3.7 V 4000Mah Battery, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an 3.7 V 4000Mah Battery is should be an indication of how long it will work out for you.

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FAQ:

Q: How big is Lipo 3.7V 4000mAh battery?

A: Premium Quality and Good Price. This LiPo Battery LP945170 3.7V 4000mAh 14.8Wh size is 9.4mm x 51mm x 70mm, it with a protection circuit module and wires 60mm and connector JST PHR-2 (A). The MOQ is 5 pieces with lead-time one week to ship when the LiPo Battery is in stock.

Q: How big is a 3.7V Li Polymer battery?

A: 3.7V Li Polymer Battery LP945170 4000mAh Voltage&Capacity: 3.7V@4000mAh Configuration: 1S1P Weight: appr. 80.0g

Q: What kind of battery is in the tokeyla 5?

A: . Only 2 left in stock – order soon. Tokeyla 5 modes 18650 flashlight with two-slot charger and 6 -pack 18650 4000mAh button Top Rechargeable battery. . . . .

3.7 V 4000Mah Battery