Shure SB904

The SB904 is Shure's lithium-ion rechargeable battery for the GLX-D+ dual-band digital wireless family. It drops into the GLXD1+ bodypack and GLXD2+ handheld transmitters and delivers up to 12 hours of runtime per charge, with accurate metering that reports remaining time in hours and minutes rather than a vague bar graph. That turns the guesswork out of a long service, event day, or rehearsal-plus-show.

Charging is flexible: the pack tops up directly on a GLX-D+ receiver, on an optional SBC10-904 sled charger, or over the USB-C port on the transmitter itself. A quick-charge feature gives about 1.5 hours of use from a 15-minute charge, and a full recharge takes roughly 2.5 to 3 hours. The cell is rated at 2420 mAh (8.71 Wh) with a 3.6 VDC output.