{"product_id":"leading-edge-dx266-replacement-battery-36v-2700mah-li-mno2","title":"Leading Edge DX266 PLC Replacement Battery 3.6V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLeading Edge DX266 — 3.6V Li-MnO2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 2700mAh lithium manganese dioxide cell replaces the backup battery in the Leading Edge DX266 programmable logic controller. It sustains SRAM program memory and the real-time clock during mains power interruptions. Without a functional cell, the DX266 loses retained data every time supply voltage drops.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDX266 backup power rail:\u003c\/strong\u003e\n    The DX266 uses a dedicated low-current battery rail to hold SRAM and RTC state independently of the main 24V supply. This cell matches the voltage window that rail expects — too low and memory retention fails before a fault alarm even triggers.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the DX266 backup circuit and confirmed the BMS accepted the cell without a false low-battery flag on initial insertion. Open-circuit voltage measured 3.6V at dispatch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap is mandatory on the DX266:\u003c\/strong\u003e\n    Always replace this battery with the controller powered on and in RUN mode. Removing the cell while the PLC is off clears SRAM instantly — program data is gone and must be reloaded from a programming device before the controller will run again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePLC battery alarm not clearing after a confirmed good installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eOn the DX266, a battery alarm flag is written to a status register when the cell voltage drops below threshold. Fitting a new cell does not automatically clear that register — the controller holds the fault until software acknowledges it. Connect a programming device, navigate to the system diagnostics or status word, and manually reset the battery fault bit. The alarm will not self-clear on power cycle alone.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eClock showing wrong date and time after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe real-time clock on the DX266 draws from the same backup cell as SRAM. If the swap was done with the PLC powered off — even briefly — the RTC loses its count and resets to a default timestamp. The controller will run, but any time-stamped logs or scheduled program routines will be off. Reconnect a programming device, open the RTC configuration, and write the correct date and time directly to the clock register.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415968907354,"sku":"BWCS-PLB386SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415968940122,"sku":"BWCS-PLB386SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415968972890,"sku":"BWCS-PLB386SL-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLB386SL-1.webp?v=1779758775","url":"https:\/\/batteryweb.com\/products\/leading-edge-dx266-replacement-battery-36v-2700mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}