--- product_id: 389036350 title: "DC 3.7V 4200mah 606090 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: "€ 34.29" currency: EUR in_stock: true reviews_count: 7 category: "Hxjnldc" url: https://www.desertcart.sk/products/389036350-dc-3-7v-4200mah-606090-rechargeable-lithium-polymer-replacement-battery store_origin: SK region: Slovakia --- # 3.7V nominal voltage 4200mAh capacity Overcharge protection DC 3.7V 4200mah 606090 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:** € 34.29 **Availability:** ✅ In Stock ## Summary > 🔧 Power Your Passion with Precision! ## Quick Answers - **What is this?** DC 3.7V 4200mah 606090 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?** € 34.29 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/389036350-dc-3-7v-4200mah-606090-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 - • **DIY Friendly:** Easily customize connections with heat shrinkable insulating sleeves for a seamless fit. - • **Safety First:** Equipped with advanced protection against overcharge, overdischarge, and short circuits. - • **Compact & Lightweight:** Perfectly sized at 3.54 x 2.36 x 0.24 inches and weighing only 84g for easy integration. - • **Power Up Your Projects:** Unleash the potential of your DIY electronics with a robust 4200mAh battery! - • **Versatile Compatibility:** Ideal for a range of devices including cameras, radios, and watches. ## Overview The DC 3.7V 4200mAh 606090 Rechargeable Lithium Polymer Battery is designed for DIY electronic projects requiring a reliable power source. With a nominal voltage of 3.7V and a capacity of 4200mAh, this battery is perfect for devices like cameras and radios. It features advanced safety mechanisms to prevent overcharging and short circuits, ensuring longevity and reliability. Compact and lightweight, it’s easy to integrate into various applications, making it a must-have for tech enthusiasts. ## 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: Works perfectly. - Good replacement battery. Review: Right battery, wrong size - It was the right type of battery but the actual phys ## Features - This battery is suitable for DIY electronic products with 3.7-5V and less than 15.54Wh 4200mAh 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. - 606090 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 4200mAh, power 15.54Wh, ★size 3.543 x 2.362 x 0.236inch(91×60×6mm) (L*W*T), Weight:2.963oz(84g)，Maximum current:4A。 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, 3302-20 high temperature resistant silicone cable - If there are any quality issues within a year, ★please feel free to contact us via email for replacement. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B095BP7V1D | | Amperage | 4 Amps | | Antenna Location | Camera,Digital,Radio,Watch | | Battery Capacity | 4000 Milliamp Hours | | Battery Cell Composition | Lithium Polymer | | Battery Cell Type | Lithium Polymer | | Battery Weight | 75 Grams | | Best Sellers Rank | #324,249 in Health & Household ( See Top 100 in Health & Household ) #690 in 3.7V Batteries | | Brand | HXJNLDC | | Customer Reviews | 4.4 out of 5 stars 91 Reviews | | Item Dimensions | 3.58 x 2.36 x 0.24 inches | | Item Weight | 84 Grams | | Manufacturer | HXJN | | Model Name | 606090 | | Model Number | 606090 | | Number of Batteries | 1 Lithium Polymer batteries required. (included) | | Recommended Uses For Product | Camera,Digital,Radio,Watch | | Reusability | Rechargeable | | UPC | 717664364262 | | Unit Count | 1.0 Count | | Voltage | 3.7 Volts (DC) | ## Product Details - **Number of Batteries:** 1 Lithium Polymer batteries required. (included) - **Brand:** HXJNLDC - **Battery Cell Composition:** Lithium Polymer - **Recommended Uses For Product:** Camera,Digital,Radio,Watch - **Unit Count:** 1.0 Count ## Images ![DC 3.7V 4200mah 606090 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/61vCoJ7fMmL.jpg) ![DC 3.7V 4200mah 606090 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/61OzLBtkDwL.jpg) ![DC 3.7V 4200mah 606090 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 4200mah 606090 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 4200mah 606090 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/61ZUh4ho49S.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works perfectly. *by L***R on October 8, 2025* Good replacement battery. ### ⭐⭐⭐⭐⭐ Right battery, wrong size *by V***A on October 18, 2022* It was the right type of battery but the actual phys ### ⭐⭐⭐⭐ mooie vervanging *by P***S on September 30, 2025* Goed product maar wel opletten dat je de versie met of zonder electronica aan de + en - draden bestelt, volgens vereiste van toepassing. ## Frequently Bought Together - HXJNLDC DC 3.7V 4200mah 606090 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply. - elechawk 10pcs Upgraded Tiny Whoop JST-PH 2.0 Male and Female Connector Cable for Battery JJRC H36 H67 Blade Inductrix E010 E013 - HiLetgo 3pcs TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Charging Board with Dual Protection Functions --- ## 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.sk/products/389036350-dc-3-7v-4200mah-606090-rechargeable-lithium-polymer-replacement-battery](https://www.desertcart.sk/products/389036350-dc-3-7v-4200mah-606090-rechargeable-lithium-polymer-replacement-battery) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-06-08*