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3.7V Lipo Battery 3000mAh Rechargeable Lithium Polymer Batteries Pack with Wire JST1.25mm Connector Integrated Protection Circuit for Arduino ESP32 Development Board for Speaker Wireless Device

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Availability: In Stock.
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Arrives Friday, May 8
Order within 1 hour and 19 minutes
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Size: 1


Features

  • Battery Specifications:Dimensions: 36*10*65mm/ 1.42*0.39*2.56inch;Battery Weight(Single): 49g; Capacity: 3000mAh; Plug: JST1.25; Discharge Rate: 1C. Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase.1.Battery Size; 2.Connector Model;3.Connector Size; 4.Connector Polarity - THIS IS NOT UNIVERSAL!!! (It will cause a shortage if the polarity of the battery connector does not match your device.)
  • Reliable Performance: Our 3.7 volt rechargeable lithium polymer battery provides reliable performance with long life. It is no fire, no explosion or no leakage after vibration and collision.Each lipo battery comes equipped with a built-in protection board that prevents overcharging, over-discharging, overcurrent, overheating, and short circuits. Enjoy peace of mind while using our lithium polymer battery, knowing that it is designed with advanced safety features.
  • Application:Our batteries are perfect for ESP3 projects or a small Internet of Things (IoT) project. Also suitable for battery replacement of DIY 3.7V electronic products, mobile energy storage, power supply, LED light, wireless Bluetooth game headset, Bluetooth speaker, outdoor video and audio electronic scale, GPS Watch recorder, USB Fan tester, dash cam controller, gaming controller, electric toy car, mouse and keyboard, Wi-Fi smart home system, digital camera, e-book, and so on.
  • Easy Installation with Micro JST1.25 Connector: The 3000mAh lithium polymer battery feature a Micro JST1.25 connector and a wire of about 70mm, making installation simple and convenient. Upgrade your devices effortlessly with our user-friendly design, ensuring a secure connection for maximum performance.(NOTE!!! The maximum operating current of this battery is only about 1.5A, Can Not be used for unmanned vehicles, model aircraft or other products that require high current)

Number of Batteries: 1 Lithium Polymer batteries required. (included)


Brand: JLJLUP


Battery Cell Composition: Lithium Polymer


Battery Capacity: 3000 Milliamp Hours


Recommended Uses For Product: ESP32; Small Internet of Things (IoT) project;


Product Dimensions: 2.56 x 1.42 x 0.39 inches


Item Weight: 2.25 ounces


Batteries: 1 Lithium Polymer batteries required. (included)


Date First Available: July 11, 2025


Manufacturer: JLJLUP


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


  • OK so far
Size: 2
They seem alright so far. Used on Heltec V3s. It has been a bit of work to find cases that will hold these batteries and the Heltec, though. They seem to get about 10 hours per charge, but there's lots of activity on my mesh. Seem to run a bit hot.
Reviewed in the United States on February 10, 2026 by Ann Teefah

  • Batteries should be part of kits
Size: 2
Wrong size for there radio ..had to really push to get it seated and still no joy, they really should include batteries with their kits and not force these types of issuses
Reviewed in the United States on February 18, 2026 by Brian Watters

  • No great.
Size: 1
Battery drops 5% just unplugging it. Down to 80% within 90 minutes. Thus is with a Heltec V3 with Bluetooth disabled.
Reviewed in the United States on February 10, 2026 by Joe

  • replacement
Size: 1
as expected and on time
Reviewed in the United States on February 20, 2026 by Jose Herrera

  • A pretty good battery
Size: 4
Good battery has a good amount of battery. Life does need an adapter if you need to power anything above 3 V of power and the size is pretty reason. It’s in a bowl. I thought it would be bigger, but it was pretty small.
Reviewed in the United States on January 3, 2026 by Logan LaPedis

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