SB900C Rechargeable 1700 mAh Battery for QLX-D / ULX-D / PSMDesigned for Shures Axient Digital, ULX D, QLX D, and PSM wireless systems, the SB900C Rechargeable Lithium Ion Battery delivers enhanced reliability over disposable batteries, with higher capacity for extended usage times. With more charge cycles and a long lifespan that can replace over 1,000 AA batteries, the SB900C offers a sustainable power solution without compromising performance. The SB900C is a rechargeable lithium ion battery compatible with