--- product_id: 261798251 title: "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" brand: "hxjnldc" price: "R601" currency: ZAR in_stock: true category: "Hxjnldc" url: https://www.desertcart.co.za/products/261798251-dc-3-7v-620mah-503040-rechargeable-lithium-polymer-battery-cozmo store_origin: ZA region: South Africa --- # 0.6A max current output 620mAh high-capacity power Advanced multi-protection circuit 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 **Brand:** hxjnldc **Price:** R601 **Availability:** ✅ In Stock ## Summary > 🔋 Power your smart life with confidence and style! ## Quick Answers - **What is this?** 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 by hxjnldc - **How much does it cost?** R601 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/261798251-dc-3-7v-620mah-503040-rechargeable-lithium-polymer-battery-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 - • **Reliable Power Boost:** 620mAh capacity fuels your devices longer, keeping you connected and productive. - • **Compact & Lightweight:** Slim 5×30×41mm design at just 13g fits seamlessly into your tech without bulk. - • **Easy Installation Kit:** Includes heat shrinkable insulating sleeve for quick, secure wiring—no tech headaches. - • **Safe & Smart Charging:** Built-in Japanese Seiko IC safeguards against overcharge, overdischarge, and short circuits for worry-free use. - • **Universal Compatibility:** Perfect replacement for Cozmo Vector Robot, SkyBell HD, Flysight FPV Watch, and other 3.7-5V devices under 2.3Wh. ## Overview This HXJNLDC 503040 rechargeable lithium polymer battery delivers 3.7V at 620mAh capacity with a max current of 0.6A. Engineered with a Japanese Seiko IC for overcharge and short circuit protection, it’s a compact, lightweight replacement battery ideal for Cozmo Vector Robot, SkyBell HD WiFi Video Doorbell, Flysight FPV Watch, and similar low-power electronics. Includes installation accessories and backed by a 1-year quality guarantee. ## Description Buy 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: Portable Bluetooth Speakers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - Compatible with COZMO Vector robot SkyBell HD WiFi Video Doorbell Flysight FPV Watch wireless speaker Battery replacement。It can also be used in other 3.7-5V electronic products with power less than 2.3Wh (620mAh).（★ Not applicable to high-power electric tools and model aircraft） - Please compare the connector specifications and polarity according to the display diagram before purchasing,★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 2.29Wh, 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 Pitch1.25mm 2-pin 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 A | | Antenna Location | GPS, Radio, Watch | | Battery Capacity | 620 milliamp_hours | | Battery Cell Type | Lithium Polymer | | Battery Weight | 13 g | | Brand | HXJNLDC | | Customer Reviews | 4.4 4.4 out of 5 stars (815) | | Included Components | 620mAh battry x 1 pack, heat shrinkable insulating sleeve x 1 | | Item Dimensions | 1.61 x 1.18 x 0.2 inches | | Item Weight | 0.02 kg | | Manufacturer | HXJNLDC | | Model Name | 503040 | | Model Number | 503040 | | Number of Batteries | 1 C batteries required. (included) | | Reusability | Rechargeable | | UPC | 054114076826 | | Unit Count | 1 Count | | Voltage | 3.7 volts_of_direct_current | ## 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:** GPS, Radio, Watch ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61HDn2M23KL.jpg) ## Available Options This product comes in different **Color** options. ## 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.co.za/products/261798251-dc-3-7v-620mah-503040-rechargeable-lithium-polymer-battery-cozmo](https://www.desertcart.co.za/products/261798251-dc-3-7v-620mah-503040-rechargeable-lithium-polymer-battery-cozmo) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-25*