This Li-Polymer battery is a high-quality replacement for the ARCHOS AV404 AV-404 PMP ACCU. It is compatible with a wide range of brands and models, making it a versatile choice for anyone looking for a reliable battery for their portable audio devices. With its long-lasting power and durable construction, this battery is sure to provide you with many hours of uninterrupted audio playback. Whether you're listening to music on the go or watching your favourite movies and TV shows, this battery is the perfect accessory to ensure that your device stays powered up and ready to go. So why wait? Order your Li-Polymer battery today and experience the convenience and reliability that it has to offer!