{"product_id":"dc-battery-dc1185-replacement-battery-36v-2700mah-li-mno2","title":"DC Battery 3.6V PLC Backup Compatible Battery DC1185 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDC Battery DC1185 \/ DC1384 — 3.6V Li-MnO2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V lithium manganese dioxide cell rated at 2700mAh (9.72Wh), built to maintain SRAM and real-time clock backup in the DC1185 and DC1384 programmable logic controllers. When main power drops, this cell keeps the controller's program memory and clock intact. Without it, the PLC loses its program and requires a full reload from the programming device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDC1185 and DC1384 compatibility:\u003c\/strong\u003e\n    Both controllers share the same backup cell specification — identical voltage rail, physical footprint, and connector. One cell covers both models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell at rated load on the bench and confirmed the BMS holds stable output voltage throughout the discharge curve. The cell maintains the minimum SRAM retention threshold across the full expected service interval.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap protocol — do not power down first:\u003c\/strong\u003e\n    Always replace this battery with the PLC powered on and in RUN mode. Removing the cell while the controller is off collapses SRAM voltage instantly and wipes the stored program. If the swap was done with power off, connect a programming device and reload the program from backup before restarting the controller.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DC1185 loses its program after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DC1185 holds its ladder logic in volatile SRAM. That memory requires a continuous voltage supply — either from the main power rail or from this backup cell — with no gap between them. The moment the old cell is removed and before the new one seats, SRAM voltage drops to zero. That wipe takes milliseconds. The controller then boots with no program loaded and enters fault mode on the next power cycle.\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\"\u003eThe DC1185 does not automatically clear a low-battery alarm once a new cell is installed. The alarm flag is written to a status register and stays set until it is manually acknowledged in the programming software. Connect the programming device, navigate to the controller's diagnostic or status screen, and reset the battery alarm flag from there. The alarm clears immediately on confirmation — no power cycle required.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415970381914,"sku":"BWCS-PLB386SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415970414682,"sku":"BWCS-PLB386SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415970447450,"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\/dc-battery-dc1185-replacement-battery-36v-2700mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}