2x Pack - Sennheiser RS65 Battery - Replacement for Sennheiser BA151 Headset Battery (60mAh, 2.4V, NI-MH) Replacement Sennheiser RS65 Battery Replacement for Sennheiser BA151 Headset Batteries Quantity: 2, Lifetime Warranty Capacity: 60mAh, Upstart Battery Brand On Sale for a Limited Time!