Replacement battery for SSM Transmitters. Specifications: 750mAh, 3.7V, Li-ion. Compatible with: SSM Transmitters, IFBR1B Receiver, SSM Bodypack Transmitter, SSM Micro Transmitter. Replaces: Lectrosonics LB-50. Lectrosonics replacement battery designed for Transmitters & Receiver devices. A precise, secure fit you can rely on.