{"product_id":"fanuc-16i-replacement-battery-3v-2000mah-li-mno2","title":"Fanuc LX98L-0031-0012 Compatible Battery 3V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFanuc 16i \/ 18i \/ 21i Series — 3V Li-MnO2 Replacement Battery (LX98L-0031-0012)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V lithium manganese dioxide cell rated at 2000mAh (6Wh), replacing OEM part LX98L-0031-0012. It fits the Fanuc 16i, 18i, and 21i CNC control systems. Its sole job is to hold voltage on the SRAM module so programs, parameters, and tool offsets survive a main power cut.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e16i \/ 18i \/ 21i memory backup rail:\u003c\/strong\u003e\n    All three control variants share the same 3V SRAM backup circuit and the same physical cell format. The connector and BMS handshake are identical across the series, so one cell covers all three.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against an active 16i control and monitored the backup rail. Voltage held steady at 3.0V under the SRAM load with no BMS dropout or alarm triggered during the swap cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap rule for this controller:\u003c\/strong\u003e\n    Always replace this cell with the Fanuc control powered on and in RUN mode. The SRAM has no secondary hold circuit — removing the old cell while the machine is off will erase all stored programs and parameters instantly. A cold swap means a full program reload from your programming device before the machine runs again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Fanuc 16i loses program memory after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 16i SRAM is volatile — it needs a continuous voltage above roughly 2.5V to retain data. There is no capacitor or secondary cell buffering the backup rail. The moment the old cell is removed and the new one is not yet connected, the SRAM voltage collapses. Even a two-second gap during a cold swap is enough to wipe the memory array completely. Hot-swapping with the controller live is the only way to avoid this.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBAT alarm not clearing after a confirmed good cell installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Fanuc 16i does not automatically cancel the BAT alarm once a new cell is fitted. The alarm flag is latched in the PMC and must be reset manually. Power-cycle the control after installing the new cell, then navigate to the system alarm screen and clear the battery alarm through the MDI panel. If the alarm returns within 24 hours, check the cell seating — a partially engaged connector can read as low voltage on the backup rail even with a fresh cell installed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415987617882,"sku":"BWCS-FN200SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415987650650,"sku":"BWCS-FN200SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415987683418,"sku":"BWCS-FN200SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FN200SL-1.webp?v=1779758841","url":"https:\/\/batteryweb.com\/products\/fanuc-16i-replacement-battery-3v-2000mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}