Security not an issue? That is a mistake. There is always the risk of a power failure which could turn out to be expensive in terms of cost and time. CNC memory loss can happen quickly. So preventive maintenance is the key to being ready for action!
FANUC Lithium Battery A98L-0031-0026
PANASONIC BR-2/3A 3V Battery A98L-0031-0006
PANASONIC BR-AGCF2W 6V Battery A98L-0031-0011
PANASONIC BR-AGCT4A 6V Battery A98L-0031-0025
PANASONIC BR-C 3V Battery A98L-0031-0007
PANASONIC BR-CCF2TH 6V Battery A98L-0001-0902
SANYO CR17335SE-R Battery A98L-0031-0006
SANYO CR17450SE-R Battery A98L-0031-0012
The CNC battery and servo drive battery should be regularly checked and changed periodically to preserve the contents of the memory. The batteries allow back-up of both CNC and servo drive data. When low battery voltage is activated, loss of CNC and servo drive programs, offsets and parameters will be noticed within a week. So spare FANUC batteries should be kept here and now in readiness for when it happens.