--- 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: "AR$69471" currency: ARS in_stock: true category: "Hxjnldc" url: https://www.desertcart.com.ar/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery store_origin: AR region: Argentina --- # 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:** AR$69471 **Availability:** ✅ In Stock ## Summary > 🔋 Power up your creativity with smart, safe, and lasting energy! ## 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?** AR$69471 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/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 - • **Long-Lasting Energy on the Go:** Generous 3000mAh capacity ensures extended runtime for your custom devices and mobile power needs. - • **Safe & Smart Battery Management:** Integrated Japanese Seiko IC protects against overcharge, overdischarge, overcurrent, and short circuits. - • **Lightweight & Compact Powerhouse:** Slim 66×36×10mm size and just 47.4g weight—ideal for sleek, portable DIY electronics. - • **Plug & Play or Customizable Wiring:** Includes genuine JST 2-wire connector with clear polarity; easily cut and solder for perfect fit. - • **Power Your DIY Projects with Confidence:** Reliable 3.7V lithium polymer battery designed for versatile 3.7-5V electronics under 11.1Wh. ## Overview The HXJNLDC 103665 rechargeable lithium polymer battery delivers a robust 3000mAh capacity at 3.7V nominal voltage, optimized for DIY electronics requiring 3.7-5V and under 11.1Wh. Featuring a built-in 2-wire JST connector and advanced Japanese Seiko IC protection, it ensures safe, reliable power with overcharge, overdischarge, overcurrent, and short circuit safeguards. Compact and lightweight, this battery is perfect for powering your custom gadgets and mobile energy storage solutions, backed by a 1-year warranty for peace of mind. ## Description desertcart.com: HXJNLDC 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 : Health & Household ## 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 | |---------------|-------| | ASIN | B091Y3TW9F | | Amperage | 3 A | | Antenna Location | GPS, Power Tool, Watch | | Battery Capacity | 3000 milliamp_hours | | Battery Cell Type | Lithium Polymer | | Battery Weight | 47.3 g | | Best Sellers Rank | #356,700 in Health & Household ( See Top 100 in Health & Household ) #611 in 3.7V Batteries | | Brand | HXJNLDC | | Customer Reviews | 4.0 4.0 out of 5 stars (147) | | Item Dimensions | 2.6 x 1.42 x 0.39 inches | | Item Weight | 51 g | | Manufacturer | HXJN | | Model Name | 103665 | | Model Number | 103665 | | Number of Batteries | 1 Lithium Polymer batteries required. (included) | | Reusability | Rechargeable | | UPC | 723258290015 | | Unit Count | 1 Count | | Voltage | 3.7 volts_of_direct_current | | Warranty Description | 1 | ## Product Details - **Battery Capacity:** 3000 milliamp_hours - **Battery Cell Composition:** Lithium Polymer - **Brand:** HXJNLDC - **Number of Batteries:** 1 Lithium Polymer batteries required. (included) - **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/61etOocosML.jpg) ## 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.com.ar/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery](https://www.desertcart.com.ar/products/321203704-dc-3-7v-3000mah-103665-rechargeable-lithium-polymer-replacement-battery) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-18*