--- product_id: 321203704 title: "DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply" brand: "hxjnldc" price: "131.12 DT" currency: TND in_stock: true reviews_count: 13 category: "Hxjnldc" url: https://www.desertcart.tn/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery store_origin: TN region: Tunisia --- # 3A max current output 3000mAh high capacity Built-in multi-protection IC DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply **Brand:** hxjnldc **Price:** 131.12 DT **Availability:** ✅ In Stock ## Summary > 🔋 Power your passion, never run out of juice! ## Quick Answers - **What is this?** DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply by hxjnldc - **How much does it cost?** 131.12 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery) ## Best For - hxjnldc enthusiasts ## Why This Product - Trusted hxjnldc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Mighty:** Slim 66×36×10mm form factor fits seamlessly into tight spaces without compromise - • **Plug & Play or Customizable:** Includes genuine JST 2-wire connector with easy soldering options for perfect polarity alignment - • **Long-Lasting Energy on the Go:** Generous 3000mAh capacity ensures extended runtime for your custom builds - • **Safe & Smart Battery Management:** Integrated Japanese Seiko IC protects against overcharge, overdischarge, and short circuits - • **Power Your DIY Projects with Confidence:** Reliable 3.7V lithium polymer battery tailored for versatile 3.7-5V electronics ## Overview This 3.7V 3000mAh rechargeable lithium polymer battery is designed for DIY electronic projects requiring 3.7-5V power with up to 3A current. Featuring a compact 66×36×10mm size and weighing just 47.4g, it integrates a high-quality Japanese Seiko IC for comprehensive protection against overcharge, overdischarge, overcurrent, and short circuits. The battery comes with a genuine JST 2-wire connector and flexible wiring options, making it ideal for custom electronics, mobile energy storage, and replacement power supplies—backed by a 1-year quality guarantee. ## Description Product description DC 3.7V Model Table of Square Rechargeable Polymer Lithium Battery (applicable to 3.7V-5V electronic products) Please note that connector specifications and polarity are based on the product display image., the red wire is the positive "+" and the black wire is the negative "-"The yellow ( white) lead is a 'thermistor'，Do not reverse-charge or reverse-connectreverse. 3 -wi r e batteries retain red and black wires, which can replace 2 -wi r e batteries. Some products' original batteries may lack plugs, have incompatible plugs, or exhibit mismatched polarity. No worries—you can simply cut the wires and use the included heat-shrink tubing to connect the wires of the same color from the old plug. Review: Renewed the life of motorcycle headset - This battery renewed the life of my Sena 20s motorcycle headset. Review: Good product - It was great ## Features - This battery is suitable for DIY electronic products with 3.7-5V and less than 11.1Wh 3000mAh built-in 2-wire battery replacement.（★ Not applicable to high-power electric tools and model aircraft） - Please note that the specifications and polarity of the connector are based on the product display image,★the red wire is the positive "+" and the black wire is the negative "-"，Do not reverse-charge or reverse-connectreverse. ★The primary battery of some products has no plug or mismatched plug or mismatched polarity. It doesn't matter, you can cut and solder the plug directly or use our heat shrinkable insulating sleeve to connect the same color wire. - 103665 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 3000mAh, power 11.1Wh, ★size 66×36×10mm(2.6×1.417×0.393inch）(T*W*L), Weight:47.4g(1.676oz)，Maximum current:3A。 It can prevent overcharge, overdischarge, overcurrent, and short circuit. - It‘s consists of of large-capacity A+ lithium battery, Japanese Seiko IC overcharge and overcurrent short circuit protection board, 3302-24 high temperature resistant silicone cable, and genuine JST Pitch 2.0mm ★2 wire connector module. - If there are any quality issues within a year,★ please feel free to contact us via email for replacement. ## Technical Specifications | Specification | Value | |---------------|-------| | Antenna Location | Power Tool, Watch, GPS | | Item Weight | 51 Grams | | Battery Weight | 47.3 Grams | | Item Dimensions | 2.6 x 1.42 x 0.39 inches | | Unit Count | 1 Count | | Battery Cell Type | Lithium Polymer | | Amperage | 3 Amps | | Battery Capacity | 3000 Milliamp Hours | | Reusability | Rechargeable | | Voltage | 3.7 Volts (DC) | ## Product Details - **Number of Batteries:** 1 Lithium Polymer batteries required. (included) - **Brand:** HXJNLDC - **Battery Cell Composition:** Lithium Polymer - **Battery Capacity:** 3000 Milliamp Hours - **Recommended Uses For Product:** GPS, Power Tool, Watch ## Images ![DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply - Image 1](https://m.media-amazon.com/images/I/61wvu-m0NbL.jpg) ![DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply - Image 2](https://m.media-amazon.com/images/I/71r8nG3TLOL.jpg) ![DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply - Image 3](https://m.media-amazon.com/images/I/81jSmvePDIL.jpg) ![DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply - Image 4](https://m.media-amazon.com/images/I/81ygEeonPJL.jpg) ![DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Products with Built-in 2-Wire Battery Replacement, Mobile Energy Storage Power Supply - Image 5](https://m.media-amazon.com/images/I/6166cOhvuZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Renewed the life of motorcycle headset *by D***Y on November 12, 2024* This battery renewed the life of my Sena 20s motorcycle headset. ### ⭐⭐⭐⭐⭐ Good product *by C***. on February 16, 2025* It was great ### ⭐ Could not support a 1 amp load even when it was rated for 3 amps. *by S***N on October 26, 2024* Could not support a 1 amp load even when it was rated for 3 amps. I specifically purchased this because it was rated for 3amps. When the application was slightly over 1 amp (I tested this with a meter), the voltage dropped substantially and the application crashed. This is useless to me. ## Frequently Bought Together - HXJNLDC DC 3.7V 3000mAh 103665 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply - MakerFocus 10pcs TP4056 Charging Module with Battery Protection 186 50 BMS 5V Micro USB 1A 186 50 Lithium Battery Charging Board - elechawk 10pcs Upgraded Tiny Whoop JST-PH 2.0 Male and Female Connector Cable for Battery JJRC H36 H67 Blade Inductrix E010 E013 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery](https://www.desertcart.tn/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-30*