Fanuc Battery units are supplied by CNC West for your system and drive backup. CNC Electronics West carries a significant stock of all of the main Fanuc batteries with all OEM battery cells from Panasonic, Sanyo, etc. The batteries carried go in system 10, 11, 15, 0A, 0B, 0C, 16, 18, 21, 16i, 18i, 21i, 0i, control systems. They also fit in ALPHA SVM and BETA SVU drives and theyre later counterparts the ai and bi servo’s for absolute feedback reference.
As a rule of thumb the batteries whether on the control or drive; should be replaced Annually as part of a preventive maintanence strategy within the factory. If forgotten about then it can mean the loss of system information, such as part programs, offset data and system parameters or the ABS reference position. Though in the drive situation its a bit of a pain to sort out; losing the system parameters on the control is an entirely different issue.
Keep an eye out for BAT in yellow or red on the Fanuc control. This indicates you need to replace your batteries. Brand new batteries are available to ship now.