--- product_id: 628798982 title: "3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement" brand: "hxjnldc" price: "4505 som" currency: KGS in_stock: true category: "Hxjnldc" url: https://www.desertcart.kg/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo store_origin: KG region: Kyrgyzstan --- # 3.7V nominal, 4.2V max charge 620mAh high-capacity power Built-in multi-protection IC 3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement **Brand:** hxjnldc **Price:** 4505 som **Availability:** ✅ In Stock ## Summary > 🔋 Power up your tech game with confidence — never miss a beat! ## Quick Answers - **What is this?** 3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement by hxjnldc - **How much does it cost?** 4505 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo) ## 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 - • **Lightweight yet durable:** At just 13g, this battery packs power without weighing down your device. - • **DIY-friendly connectivity:** Includes genuine JST 1.25mm 2-wire connector and heat-shrink sleeve for hassle-free installation. - • **Safety-first battery tech:** Japanese Seiko IC safeguards against overcharge, overcurrent, and short circuits for peace of mind. - • **Power your smart devices effortlessly:** 620mAh capacity fuels your Cozmo Vector, SkyBell HD, and more with reliable energy. - • **Precision fit for seamless replacement:** Compact 5×30×41mm size designed for easy swap in popular gadgets and DIY projects. ## Overview This 3.7V 503040 lithium polymer battery delivers 620mAh capacity with advanced safety features including overcharge and short circuit protection. Perfectly sized for Cozmo Vector robots, SkyBell HD WiFi doorbells, Flysight FPV watches, and wireless speakers, it offers a lightweight, reliable power solution with easy DIY installation options and a 1-year replacement warranty. ## Description 3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement : desertcart.ae: Toys ## Features - Compatible with COZMO Vector robot、 SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement。Also suitable for DIY electronic products with 3.7-5V and less than 2.294Wh 620mAh 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. - 503040 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 620mAh, power 2.294Wh, ★size 5×30×41mm(0.197×1.181×1.598inch）(T*W*L), Weight:13g(0.46oz)，Maximum current:0.6A。 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, 3302-26 high temperature resistant silicone cable, and genuine JST Pitch 1.25mm ★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 | B08PKV564B | | Amperage | 0.6 Amps | | Antenna Location | Doorbell, GPS, MP3 Player, Radio, Speaker, Toys, Watch | | Battery Capacity | 620 Milliamp Hours | | Battery Cell Type | Lithium Polymer | | Battery Weight | 12.6 Grams | | Best Sellers Rank | #25,353 in Toys ( See Top 100 in Toys ) #38 in RC Batteries | | Brand | HXJNLDC | | Country of Origin | China | | Customer Reviews | 4.4 4.4 out of 5 stars (773) | | Item Dimensions | 41 x 30 x 5 millimeters | | Item Weight | 0.02 Kilograms | | Manufacturer | HXJN | | Model Number | 503040 | | Number of Batteries | 1 C batteries required. (included) | | Reusability | Rechargeable | | UPC | 054114076826 | | Voltage | 3.7 Volts (DC) | | Warranty Description | 1 | ## Product Details - **Battery capacity:** 620 Milliamp Hours - **Battery cell composition:** Lithium Polymer - **Brand:** HXJNLDC - **Number of batteries:** 1 C batteries required. (included) - **Recommended uses for product:** Doorbell, GPS, MP3 Player, Radio, Speaker, Toys, Watch ## Images ![3.7V 503040 620mAh Rechargeable Lithium Polymer Battery, Suitable for cozmo Vector robot Battery replacement,SkyBell HD WiFi Video Doorbell、Flysight FPV Watch、 wireless speaker Battery replacement - Image 1](https://m.media-amazon.com/images/I/61HDn2M23KL.jpg) ## Frequently Bought Together - HXJNLDC DC 3.7V 620mAh 503040 Rechargeable Lithium Polymer Battery for Cozmo Vector Robot SkyBell HD WiFi Video Doorbell Flysight FPV Watch Wireless Speaker Battery Replacement - PKCELL N Size 1.5V Alkaline Batteries, 10 Pack Ultra Long-Lasting MN9100/E90/LR1 Medical Battery for Medical Devices, GPS Trackers, Flashlights, Key Fobs, 10-Year Shelf Life - Duracell N 1.5V Alkaline Battery, 2 Count Pack, N 1.5 Volt Alkaline Battery, Long-Lasting for Medical Devices, Key Fobs, GPS Trackers, and More --- ## 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.kg/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo](https://www.desertcart.kg/products/628798982-3-7v-503040-620mah-rechargeable-lithium-polymer-battery-suitable-cozmo) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-10-09*