Step up to Shure rechargeable power management for your SLX-D systems. The SB903 Lithium-Ion Battery provides up to 8 hours of power for use with SLX-D Digital Wireless transmitters. View the battery charge in real-time HH:MM, accurate up to 15 minutes, visible on both SLX-D transmitter and receiver displays. Plus, track battery charge cycles and overall health statistics. Charge with Shure SB203 Dual-Docking Charging Station or SBC10- 903 Single Battery Charger, available separately.