There's a known issue: this unit doesn't charge, but it works well when a power supply provides constant power.

To use this ADJ WiFly Wireless DMX Battery - Powered Transceiver, connect it to a power supply as it doesn't charge on its own. Keep in mind that it needs a constant power source to function. When you're done using it, unplug the power supply properly. For maintenance, keep it in a dry and clean place, away from dust and moisture. Don't try to open it yourself as it may void the warranty.