{"product_id":"accutron-140128-replacement-battery-36v-2700mah-li-mno2","title":"Accutron 140128 PLC Backup Compatible Battery 3.6V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAccutron 140128 Series — 3.6V Li-MnO2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 2700mAh lithium manganese dioxide cell for PLC memory backup. It fits the Accutron 140128, 146995, 1743458, 386, and over 15 additional controller variants. The cell provides SRAM retention power during mains interruptions, keeping program data and system settings intact.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model fit on the 140128 platform:\u003c\/strong\u003e\n    These controllers share the same 3.6V backup rail, connector footprint, and BMS handshake across the listed variants. Swapping between models in this family does not require a firmware or configuration change — the backup circuit treats each cell identically.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the backup circuit under simulated mains loss. The BMS held the SRAM retention voltage above the 3.0V threshold throughout the test window, and no memory corruption events were logged on restore.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap requirement on the 140128:\u003c\/strong\u003e\n    Always replace this cell with the PLC powered on and in RUN mode. The SRAM has no secondary hold capacitor on this platform. Pull the cell while the controller is off and the program memory clears instantly — a full reload from the programming device is then required.\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\"\u003eThis happens when the old cell is removed while the controller is powered off. On the 140128 platform, SRAM is volatile — it draws retention voltage directly from the backup cell with no hold capacitor as a buffer. Once that voltage drops, the memory wipes immediately. If this has already occurred, reconnect the programming device and reload the last saved project file. Confirm the backup circuit reads above 3.0V before cycling mains power again.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm not clearing after confirmed good installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFitting a new cell does not automatically clear the low-battery fault flag on these controllers. The alarm is latched in software and requires a manual reset through the programming interface — it will not self-clear on power cycle. Open the diagnostic or status register in your programming software, locate the battery fault bit, and reset it explicitly. Once cleared, the alarm should stay off as the new cell floats up to full charge on the backup rail.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415969202266,"sku":"BWCS-PLB386SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415969235034,"sku":"BWCS-PLB386SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415969267802,"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\/accutron-140128-replacement-battery-36v-2700mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}