SB903 Rechargeable Battery for SLX-D Wireless Mic SystemsThe SB903 lithium ion rechargeable battery powers the SLX D transmitters. Use the SBC10 903 single bay or SBC203 dual bay chargers to recharge SB903 batteries. Always fully charge a new battery before first use. To fully charge a new SB903 battery, it must be placed directly in the charger. After the first charge, the battery can be charged by docking the transmitter in the SBC203 dual bay charging station. Product Features Rechargeable Battery for