Battery for Astell & Kern AK300 AK380 CP-AK380 Media Player CS-TAK380SL 3.8v $23.89 $69.99 Battery for Astell & Kern AK300 AK380 CP-AK380 Media Player CS-TAK380SL 3.8v Compatible with the following devices AK300, AK380 Compatible with Battery Part Numbers CP-AK380 Out of Stock