Specifications:

• Use: MP3 / MP4 Player
• Type: Battery Pack
• Standard Capacity: 4000mAh
• Rechargeable: Yes
• Package: No
• Nominal Voltage: 3.7V
• Model Number: for Fiio X5 I 1st Gen Player
• If on stock and track code: Yes
• Compatible for model: for Fiio X5 I 1st Gen Player
• Brand Name: anjing
• Battery Type: 100% Li-po Polymer Rechargeable Accumulator Pack Replacement