Replacement NI-MH AAA Rechargeable Batteries For Sennheiser Cordless Headphones RS 120, RS 120 II, RS 126 II, RS 160, RS 165, RS 170, RS 175, RS 180, RS 185, RS 195, RS 220 Ni-MH AAA rechargeable battery 1.2V 550 mAH Size AAA Rechargeable Batteries Check model number to confirm compatibility The Cerepros 2-Pack NI-MH AAA Rechargeable Batteries will replace your Sennheiser Cordless Headphones Batteries. Our replacement batteries aren’t the original but will work 100% like it. Our batteries will work well after you insert them into your cordless headphones. They are the choice when your originals are lost or broken. Compatible with model numbers RS 120, RS 120 II, RS 126 II, RS 160, RS 165, RS 170, RS 175, RS 180, RS 185, RS 195, RS 220