The battery is a powerful Li-Polymer replacement battery specifically designed for the Iriver H340 multimedia player as well as other models in the Iriver H series. With a capacity of 1700mAh and a voltage of 3.7 volts, this battery provides a reliable power source that allows for extended use of the device. Its compact dimensions of 4.4 mm and lightweight of 34 grams make it a practical choice for anyone looking to maintain their MP3 and media player functionality. The battery is not only a cost-effective solution but also an environmentally friendly option to extend the lifespan of your device. It is easy to install and offers high performance that meets the demands of modern multimedia applications. This replacement battery is an ideal choice for those who value quality and reliability.