I tied the wires to a 12v cigarette lighter adapter and tried a jump box the first time. Second time a tried a socket adapter.
Both times was a low battery display on the remote and on the PID. I will try a better source. I have an old laptop transformer that I'll give a whirl.
UDS', mUDS, COS. Weber gasser & kettle. Thermapen,Digiq2, Golden-Tiger