Sennheiser quality with a sennheiser price!,
Verified Purchase(What is this?)
This review is from: Sennheiser BA 370 PX Rechargeable Lithium Polymer Battery for Sennheiser Headphones (Electronics)
Essential, tiny and very expensive. I purchased a spare about 2.5years ago to go with my brand new headphones. They just died together after being hammered for that period. I have just ordered replacements.. Your sort of stuck with them 5 stars for performance 2 for value.