--- product_id: 632183953 title: "GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement" brand: "gymin" price: "KD 13.89" currency: KWD in_stock: true url: https://www.desertcart.com.kw/products/632183953-gymin-3-7v-503040-battery-620mah-for-cozmo-vector-robot store_origin: KW region: Kuwait --- # 3.7V nominal voltage 620mAh capacity Overcharge protection GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement **Brand:** gymin **Price:** KD 13.89 **Availability:** ✅ In Stock ## Summary > 🔋 Power Your Playtime with Confidence! ## Quick Answers - **What is this?** GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement by gymin - **How much does it cost?** KD 13.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/632183953-gymin-3-7v-503040-battery-620mah-for-cozmo-vector-robot) ## Best For - gymin enthusiasts ## Why This Product - Trusted gymin brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **🛡️ Safety First:** Equipped with advanced protection against overcharge, overdischarge, and short circuits for peace of mind. - • **🔌 Easy Installation:** Includes a genuine JST connector and clear polarity markings for hassle-free replacement. - • **🔋 Power Up Your Devices:** With a robust 620mAh capacity, this battery ensures your gadgets stay powered longer. - • **⚡ Versatile Compatibility:** Perfectly fits COZMO Vector robots, SkyBell HD doorbells, and more—your go-to battery for multiple devices. - • **🌡️ High-Temperature Resilience:** Features a silicone cable that withstands high temperatures, ensuring durability and reliability. ## Overview The GYMIN 3.7V 503040 Battery is a high-performance lithium-ion polymer battery designed for various electronic devices, including the COZMO Vector robot and SkyBell HD WiFi Video Doorbell. With a capacity of 620mAh and built-in safety features, it ensures reliable power delivery and protection against common electrical issues. Its compact size and lightweight design make it an ideal replacement battery for tech enthusiasts. ## Description GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement ## Features - Compatible ：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). - 503040 rechargeable lithium ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 620mAh, power 2.29Wh, 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. - Please carefully compare the polarity of the connector before use,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. - Before replacing, please contrast with the old battery and check the polarity of the battery. Red wire connection power positive " +" , Black wire connect power negative pole "-". if is a reversed, you need position of interchange wires. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CRQ1BK3L | | Batteries | 1 Lithium Polymer batteries required. (included) | | Best Sellers Rank | #516,736 in Health & Household ( See Top 100 in Health & Household ) #1,677 in 3.7V Batteries #2,430 in Coin & Button Cell Batteries | | Customer Reviews | 4.1 4.1 out of 5 stars (10) | | Date First Available | January 7, 2024 | | Item Weight | 0.423 ounces | | Item model number | 503040 | | Manufacturer | GYMIN | | Package Dimensions | 5.71 x 3.82 x 1.89 inches | ## Product Details - **Number of batteries:** 1 Lithium Polymer batteries required. (included) - **Brand:** GYMIN - **Battery cell composition:** Lithium Polymer - **Compatible phone models:** 503040 battery - **Recommended uses for product:** 503040 battery 620mAh ## Images ![GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 1](https://m.media-amazon.com/images/I/61PHHH3JWWL.jpg) ![GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 2](https://m.media-amazon.com/images/I/617bUwa+4BL.jpg) ![GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Image 3](https://m.media-amazon.com/images/I/61vVzd3PtYL.jpg) ## Frequently Bought Together - GYMIN 3.7V 503040 Battery 620mAh for Cozmo Vector Robot Battery Replacement,SkyBell HD WiFi Video Doorbell Battery Replacement,Flysight FPV Watch、 Wireless Speaker Battery Replacement - Energizer E90 N Alkaline 1.5 Volt Battery (6-Pack) --- ## 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.kw/products/632183953-gymin-3-7v-503040-battery-620mah-for-cozmo-vector-robot](https://www.desertcart.com.kw/products/632183953-gymin-3-7v-503040-battery-620mah-for-cozmo-vector-robot) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-19*