The CR2477 Battery Button Coin Cell Batteries are high-quality lithium batteries manufactured by Eunicell. With a voltage of 3V and an amp hours of 900mAh, these coin cell batteries are ideal for various applications, including high and low drain devices. The batteries come in a pack of 5 units and have a manufacturer warranty of 1 month. With an expiry date of 10 years, these batteries are reliable and long-lasting, making them a great choice for powering devices in different sectors such as sound and vision. Made in China, these batteries offer consistent performance for your convenience.