Sennheiser BA370 PX Replacement Rechargeable Battery

I’ve had my PX headphones for years and the old battery finally gave out; this replacement restored the same 30-hour playback I remember. Snapped in without any hassle and charges fully in about 2 hours.

This spare battery snapped right into my PX headphones and held a charge for almost 8 hours on the first use. It's a relief to have a backup so I never run out of power mid-flight.

Finally got this spare to replace the original that came with my headphones, and it fits perfectly—no wobble or loose connection. The battery life matches the original, so I can listen for a full workday without worrying about charging.