The Ace621733 earphone accessories include the Cameron Sino battery, which provides long-lasting power for various Sony earphone models and the Fiio BTR3K audio receiver. The battery features:

• Capacity: 280 mAh
• Voltage: 3.7 V
• Dimensions: 32.00 x 17.40 x 5.70 mm
• Weight: 6 g

Additional features of the battery include:

• No memory effect, allowing repeated charging without capacity loss
• CE certification for safe use
• Full compatibility with genuine Sony batteries

The battery is not only functional but also features an attractive design. The black color adds elegance, while Li-Polymer technology ensures quality construction. This battery is considered an ideal choice for Sony earphone owners seeking a reliable replacement.