Cameron Sino Rechargeble Battery for Sennheiser RI100-A/RI100-J Type: Li-Polymer, Volts: 2.4V, Capacity: 60mAh Dimension: 12.00 x 33.00 x 18.00mm, Weight: 50g All Products are Certificated with ISO9001, RoHS & CE 14 Days Money Back Guarantee and 12 Months Warranty