Shure SB904 Lithium-Ion Rechargeable BatteryLithium Ion Rechargeable Battery Beskrivelse New SB904 lithium ion rechargeable battery makes powering GLX D+ wireless systems easy. With up to 12 hours of runtime and accurate metering in hours minutes, the new GLXD+ batteries can be charged directly on the receiver, via optional sled charger, or via USB C connector on the handheld microphone or bodypack (sold separately). A quick charge feature allows for 1. 5 hours of usage from a 15 minute charge.