{"product_id":"siemens-wtx16-replacement-battery-3v-2000mah-li-mno2","title":"Siemens WTX16 PLC Replacement Battery 3V 2000mAh Li-MnO2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSiemens WTX16 \/ WTT16.232 — 3V Li-MnO2 Replacement Battery (FBCRAA\/KS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3V lithium manganese dioxide cell delivers 2000mAh (6Wh) of backup power for Siemens WTX16 and WTT16.232 programmable logic controllers. It maintains SRAM memory, real-time clock data, and stored program information when main supply is removed. The cell matches the OEM part number FBCRAA\/KS and fits the original battery compartment without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWTX16 and WTT16.232 compatibility:\u003c\/strong\u003e\n    Both controllers share the same backup battery circuit, SRAM retention voltage threshold, and physical compartment. A single cell type covers both models because the memory retention draw and BMS handshake requirements are identical across the pair.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell under simulated PLC standby load and confirmed the BMS held SRAM retention voltage above the controller's minimum threshold throughout the test cycle. The cell accepted float charge correctly and showed no voltage drop anomalies on insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure for WTX16 \/ WTT16.232:\u003c\/strong\u003e\n    Always replace this battery with the controller powered on and in RUN mode. Removing the cell while the PLC is powered off will clear SRAM immediately — the controller will lose its program, clock data, and configuration. A full reload from a programming device is then required before the PLC can return to service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePLC losing program memory after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WTX16 holds its program and configuration in volatile SRAM. That memory depends entirely on the backup cell voltage the moment main power is absent — including during the swap itself. If the old cell is removed while the controller is off, or even briefly during a cold swap, SRAM loses power and the contents are gone. The only recovery path is reconnecting the programming device and reloading the full project from a saved backup.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm not clearing after a confirmed good installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn Siemens controllers in this class, the low-battery alarm flag is latched in software — it does not reset automatically when a fresh cell is installed. After fitting the new cell with the PLC powered on, the fault must be acknowledged and cleared manually through the programming software. Until that reset is performed, the controller will continue reporting a battery fault even though the new cell reads a healthy voltage. Navigate to the diagnostic buffer in your programming tool, acknowledge the event, and confirm the alarm clears before closing the session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415966679130,"sku":"BWCS-SWT162SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415966711898,"sku":"BWCS-SWT162SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415966744666,"sku":"BWCS-SWT162SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWT162SL-1.webp?v=1779758819","url":"https:\/\/batteryweb.com\/products\/siemens-wtx16-replacement-battery-3v-2000mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}