The 503040 Li-Polymer Rechargeable Battery is a compact and lightweight power source built for a wide range of portable electronic devices. With a nominal voltage of 3.7V and a capacity of 1000mAh, it delivers stable performance and reliable charging cycles across its lifespan. Measuring just 40 x 29 x 4 mm and weighing approximately 18 grams, its slim pouch-cell design makes it ideal for space-constrained applications. The battery features built-in protection for safe operation and a low self-discharge rate for a longer shelf life. It is suitable for use in RC toys, drones, portable speakers, handheld fans, GPS devices, LED and emergency lights, wireless earphones, smartwatches, fitness bands, IoT devices, and various DIY electronics projects. The connector type is 2-Pin JST with a wire length of approximately 80mm. Charge fully before first use, store in a cool and dry place, and keep away from children. Please recycle or dispose of responsibly. NOVEL batteries are designed to deliver reliable, stable, and long-lasting power for a wide range of electronic devices and DIY applications. Built using quality cells and advanced safety features, they provide dependable performance for gadgets, portable electronics, RC toys, CCTV systems, emergency lights, Bluetooth devices, routers, wearable devices, and more. Compact, lightweight, and easy to install, these batteries are manufactured by ELECTROV8 PVT LTD in India and are suitable for everyday power requirements.