Battery for Sony SRS-XB21 3000mAh from CELLONIC  ...  more

Play music for longer with this CELLONIC® replacement Sony battery - a 100% compatible ST-05, ST-05S replacement battery for Sony SRS-XB21 wireless speakers.

Sony Bluetooth speaker not holding its charge like it used to? Simply change your original Sony SRS-XB21 battery – it's a simple, efficient and cost-effective way to bring it back to life. 

This Lithium Ion battery has been specifically designed for use as a Sony ST-05, ST-05S battery replacement, with 100% compatibility for Sony SRS-XB21 batteries and more.

Long battery life: Sony replacement battery ST-05, ST-05S, 3000mAh capacity

✔ Replacement Sony battery – a perfect replacement battery for Sony SRS-XB21 Bluetooth speakers
✔ High capacity, long runtime – extended power when you need it and fewer charges thanks to modern Lithium cells without memory effect tech – just like your original battery
✔ 100% compatible replacement for your original Sony ST-05, ST-05S battery

High-quality, tested cells for Sony speakers

✔ Long-lasting, reliable performance - high-quality cells for up to 1000 charging cycles
✔ Certified safety – CE & ROHS certified, Grade A battery with short-circuit, overheating and overvoltage protection
✔ Thorough, comprehensive testing – each battery cell is tested to ensure all safety requirements are met and that it holds and maintains the correct capacity - all before installation

Replacement ST-05, ST-05S battery for your Sony SRS-XB21 speakers
Brand: CELLONIC® Speaker Replacement Battery
Capacity: 3000mAh
Voltage: 3.78V
Cell Technology: Lithium Ion
Dimensions: 68.60 x 20.00 x 20.00mm
Alternative for / Replaces: Original ST-05, ST-05S battery 

★ 3-Year Guarantee ★
As an international specialist retailer since 2004, we know what matters when it comes to high-quality replacement wireless Bluetooth speaker batteries. That's why our replacement Sony batteries come with a 36-month guarantee!