--- product_id: 422804657 title: "402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4)" brand: "kp" price: "€ 6.94" currency: EUR in_stock: true category: "Kp" url: https://www.desertcart.hr/products/422804657-402020-3-7v-400mah-rechargeable-battery-for-smart-watch-w26 store_origin: HR region: Croatia --- # 3.7V stable voltage output 400mAh high-capacity power Lithium Polymer safe tech 402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4) **Brand:** kp **Price:** € 6.94 **Availability:** ✅ In Stock ## Summary > 🔋 Power your wrist, power your day — never miss a moment! ## Quick Answers - **What is this?** 402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4) by kp - **How much does it cost?** € 6.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/422804657-402020-3-7v-400mah-rechargeable-battery-for-smart-watch-w26) ## Best For - kp enthusiasts ## Why This Product - Trusted kp brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safe & Smart Charging:** Compatible with chargers featuring auto cutoff to prevent overcharging and overheating—protect your investment. - • **Sleek & Lightweight Design:** At just 20 grams and compact 40x20x20mm size, it fits seamlessly without adding bulk. - • **Power That Keeps You Moving:** 400mAh capacity ensures your W26/W26+ smartwatch stays energized throughout your busiest days. - • **Easy Installation, Instant Upgrade:** Designed for effortless replacement, so you can get back to tracking your life without missing a beat. - • **Precision Voltage for Peak Performance:** 3.7V output delivers consistent, reliable power tailored for your smartwatch’s optimal function. ## Overview The KP-402020 is a 3.7V, 400mAh rechargeable Lithium Polymer battery specifically engineered for W26 and W26+ smartwatches. Lightweight and compact, it offers reliable voltage output and safe charging compatibility, ensuring your wearable stays powered with minimal hassle. Manufactured in India, it comes with a limited 5-day replacement warranty against defects. ## Description KP-402020 3.7v 400mAh rechargeable battery for smart watch (W26 and W26+) easy to fit Charging Volt 4.2 VDC, Out volt 3.7v Don’t over charge or over heat use charging protector or proper charger with auto cutoff when charging is full to charge battery, ## Features - KP-402020 3.7v 400mAh rechargeable battery for smart watch (W26 and W26+) - Volt -3.7v - Capacity -400mAh ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09T77R6HQ | | Antenna Location | Watch | | Battery Capacity | 400 Milliamp Hours | | Battery Cell Composition | Lithium Polymer | | Battery Cell Type | Lithium Polymer | | Battery Weight | 20 Grams | | Box Contents | Battery Only | | Brand | KP | | Brand Name | KP | | Compatible Phone Models | w26 w26+ | | Country of Origin | India | | Customer Reviews | 2.0 out of 5 stars 1 Review | | Importer Contact Information | KP Orignal, Mumbai | | Item Dimensions | 40 x 20 x 20 Millimeters | | Item Type Name | Rechargeable Battery | | Item Weight Unit of Measure | 20 Grams | | Manufacturer | KP, kporiginalbattery@gmail.com | | Manufacturer Contact Information | kporiginalbattery@gmail.com | | Model Name | 402020 | | Model Number | 400 mAh | | Net Quantity | 1.00 Count | | Number of Batteries | 1 Lithium Polymer batteries required. (included) | | Packer Contact Information | BM Battery | | Recommended Uses For Product | Watch | | Reusability | Rechargeable | | Unit Count | 1.00 Count | | Voltage | 3.7 Volts (DC) | | Warranty Description | 5 days replacement on Manufacturer defect only, Warranty Void if used, soldered, damaged, leak, Short, swollen or Wires are cut or short. | ## Product Details - **Battery Capacity:** 400 Milliamp Hours - **Battery Cell Composition:** Lithium Polymer - **Battery Weight:** 20 Grams - **Brand:** KP - **Model Name:** 402020 - **Net Quantity:** 1.00 Count - **Number of Batteries:** 1 Lithium Polymer batteries required. (included) - **Recommended Uses For Product:** Watch - **Reusability:** Rechargeable - **Voltage:** 3.7 Volts (DC) ## Images ![402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4) - Image 1](https://m.media-amazon.com/images/I/61SAK3Y-cnL.jpg) ![402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4) - Image 2](https://m.media-amazon.com/images/I/61corTWbFAL.jpg) ## Frequently Bought Together - KP-402020 3.7v 400mAh Rechargeable Battery for Smart Watch (W26 and W26+) 400 mAh (DB-4) - Wayona USB Type C Short 65W/3A Fast Charging Data Cable for Powerbank, Android Auto, Apple CarPlay, Samsung Galaxy S24, S23, S22, S21, S20, iPhone 15, 15 Pro, 15 Pro Max, 15 Plus (0.25M, Grey) - Wayona Type C to Type C 6FT/2M 65W Long Fast Charging Cable Compatible with iPhone 16, iPhone 15 Pro/Max Series Macbook Air/Pro Samsung Galaxy S25, Ultra/S24/ S23 Flip Fold OnePlus (2M, Grey) --- ## 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.hr/products/422804657-402020-3-7v-400mah-rechargeable-battery-for-smart-watch-w26](https://www.desertcart.hr/products/422804657-402020-3-7v-400mah-rechargeable-battery-for-smart-watch-w26) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-12*