The Li-Ion battery type St-01 is a powerful and reliable energy source specifically designed for use in Sony speakers such as the SRS-X3, SRS-XB2, and SRS-XB20. With a capacity of 2600 mAh, this battery provides long-lasting performance, allowing you to enjoy music and audio content for extended periods. The rechargeable feature ensures that the battery can be easily and conveniently recharged, eliminating the need for frequent battery replacements. With a voltage of 7.4 volts, this battery guarantees a stable power supply, ensuring optimal performance of the devices. Additionally, the battery is compact and lightweight, weighing only 127.01 grams and measuring 1.91 cm in height, making it ideal for portable applications.