The Shure SB903 rechargeable battery can be charged on both the SB203 dual docking charger or in the SBC10-903 single battery charger. When the SB903 rechargeable battery is used, the battery runtime shall be displayed on both receiver and transmitter in HH:MM format, accurate to within 15 minutes. The transmitter shall also be able to show the percentage health and total charge cycles of the SB903.