This SYSTEM battery part number is A98L-0031-0028 is normally found in variety of Fanuc controllers. Specifically this Hitachi Maxwell CR17335 varient battery is contained within a cartridge for fitting in CNC series 30i/31i and Power Motion controls. The battery is lithium has the following catalogue number on these system fitted within: A02B-0323-K102 (30i-B, 31i-B, 32i-B, 35iB and powe motion i-A). Fitted in unique cartridge with special AMP connector.
The A98L-0031-0028 is a 3volt backup battery for the system memory with important system information. Fanuc recommend changing your battery every 12 months. Firstly we would like to recommend that you back up your control ASAP via PCMCIA Flash card, RS232 dump, ethernet. We always try keep these batteries in stock, though we are not perfect.
The part number is usually printed on the side of the battery. The A98L-0031-0028 batteries for Fanuc can have manufacturer part numbers from Hitachi or Maxwell which is a 2/3 height AA style battery cell.