The L-Type Battery Sled from Shure is designed for use with the Axient Digital ADX5D portable wireless receiver. Battery sleds for the Axient Digital ADX5D must be used with the ADX5BP-TA3 backplate, as this backplate includes the 4-pin connector required for the two components to mate and pass power. With the ADX5BS-L, the ADX5D can be powered by one or two L-type batteries. When two batteries are installed, one can be replaced without interrupting operation. Battery runtime changes depending on the number, type, and capacity of the batteries used.