Shure SBC203-US Dual Docking Station for SLX-D Transmitters & SB903 BatteryKeep your SLX D batteries and transmitters performing at their peak with the Shure SBC203 charging station. This charger supplies safe, even, uninterrupted current to take two SB903 batteries from 0% to 100% in under three hours. The housing is made from heavy duty ABS to survive life on the road or in the hands of a harried stage crew. Even better, the SBC203 allows you to plug in batteries, transmitters, or bodypacks for stage and theater