Can cell monitor cables be extended?
CellMon cables can be extended up to 4 metres, the cable needs to be twisted pair.
The CMU cable (grey or black cable with the blue heat-shrink) can be extended if required. Make sure you use a dual-twisted-pair cablekeeping one twisted pair for "Green/White" and another twisted pair for "Red/Black". Shielded cable if possible. Try to keep no longer than 4 metres.