This
Cable Techniques Battery Bud Power Distribution System provides the necessary components to power a Sound Devices mixer (or other brands that use the same connector) and four Lectrosonics receivers from a single 4-pin XLR power source.
The main components in this kit is the Battery Bud, which is a tiny lightweight DC distribution box that routes power to as many as five pieces of equipment from three Hirose 4-pin outputs, receiving 12-18VDC input from a common rechargeable battery such as an NP-1. The unit is ruggedly built, designed for mobile location work, and features RF-minimizing filters on the outputs, and a detachable belt clip.