CELLONIC Battery for Headset/Headphone Compatible with Sennheiser MM 400, MM 450 X, MM 400 X, BA370 - (270mAh, 3.7V)

• Fit and compatibility – Replacement battery compatible with Sennheiser PX 210 BT, MM 450 X, 400 X, 500 X, 550, PXC 310, 360, MM-550...
• Long Battery Life – High-quality Lithium-Polymer Battery delivers reliable power, multiple charge cycles and low self-discharge for everyday use
• High-Capacity Power – 270mAh capacity for efficient, long-lasting energy and stable performance
• Built for Reliability – Manufactured to strict quality standards for safe and consistent power delivery
• Smart & Cost-Effective Choice – Replace the battery to extend device life and reduce replacement costs

Description Whether you’re working, gaming or listening to music, this replacement MM 400 X, 450 X, 500 X, 550 X MM 400 X, 450 X, 500 X, 550 X battery for headphones will keep you online and charged for longer. This CELLONICLithium Polymer high-performance, rechargeable Bluetooth headset battery is the perfect MM 400 X, 450 X, 500 X, 550 X wireless headphone battery replacement, giving you long-term, reliable use – with longer breaks between charges. Specifically designed for use as a 0121147748, BA 370 PX, BA-370PX, BA370 replacement wireless gaming headset / call centre headset battery, with 100% compatibility for MM 400 X, 450 X, 500 X, 550 X earphones and more. ✔ Long battery life: replacement for Sennheiser 0121147748, BA 370 PX, BA-370PX, BA370 batteries , 270mAh capacity ✔ High-quality, tested replacement for Sennheiser battery cells – reliable power for up to 1000 charging cycles 0121147748, BA 370 PX, BA-370PX, BA370 battery replacement for Sennheiser MM 400 X, 450 X, 500 X, 550 X Sat Navs Brand: CELLONIC GPS Replacement Battery Capacity: 270mAh Voltage: 3.7V Cell Technology: Lithium Polymer Dimensions: 38.40 x 30.70 x 6.60mm Alternative for / Replaces: Original 0121147748, BA 370 PX, BA-370PX, BA370 battery ★ 3-Year Manufacturer Guarantee ★ CELLONIC's high-performance, reliable and long-lasting batteries are certified for their quality and safety. Because of this, we offer a 36-month guarante