{"product_id":"pile-ras31-replacement-battery-72v-14500mah-li-socl2","title":"Pile RAS31 Compatible Battery 7.2V 14500mAh Li-SOCl2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePile RAS31 \/ RAS21 \/ CPX1E \/ SX1E — 7.2V Li-SOCl2 Replacement Battery (LB350331)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V lithium-thionyl chloride cell rated at 14500mAh (104.4Wh), built to cross-reference OEM part numbers LB350331, BATBL13, BL13, 2ER34615M, 2LSH20-SIT, and SW-D02. It fits the RAS31, RAS21, CPX1E, and SX1E PLC platforms where the factory backup cell maintains SRAM program memory and the real-time clock during mains power outages. When this cell depletes, the controller loses its stored program on the next power cycle.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRAS31 \/ RAS21 \/ CPX1E \/ SX1E compatibility:\u003c\/strong\u003e\n    These four platforms share the same battery bay geometry, connector pinout, and BMS handshake voltage window. All four expect a 7.2V Li-SOCl2 cell — substituting a lithium-ion cell of the same physical size will trigger a battery fault because the discharge curve is different.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against a live RAS31 in RUN mode and confirmed the BMS accepted the new cell without a fault code. SRAM retention voltage held above the 6.8V threshold the controller monitors, and the battery alarm cleared after the manual reset step in the programming software.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure on these PLCs:\u003c\/strong\u003e\n    Always replace this battery with the controller powered on and in RUN mode. The SRAM on the RAS31 and its siblings has no capacitor hold-up — pulling the cell while the PLC is powered off will erase the program, and a full reload from the programming device will be required before the controller will restart.\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 RAS31 stores its ladder logic and configuration in battery-backed SRAM with no onboard capacitor buffer. The moment battery voltage drops below approximately 6.8V — or the cell is disconnected while the PLC is off — that SRAM loses power and the program is gone. This is not a fault with the new cell; it is a consequence of swapping while the controller was de-energised. To recover, connect the programming device, reload the last saved project file, and confirm the program checksum before returning the PLC to RUN mode.\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 the RAS31 and CPX1E platforms, the battery alarm latch does not reset automatically when a new cell is installed — it stays active until cleared manually in the programming software. Open the diagnostic or status menu in your programming environment, locate the battery alarm flag, and issue a manual reset command. If the alarm returns immediately after reset, check that the cell voltage is above 7.0V at the connector; a new Li-SOCl2 cell shipped in storage mode may read as low as 6.9V and will rise to full rated voltage within a few hours on the PLC's float charge circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415972839514,"sku":"BWCS-BFT200BT-1","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415972872282,"sku":"BWCS-BFT200BT-2","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415972905050,"sku":"BWCS-BFT200BT-3","price":71.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BFT200BT-1.webp?v=1779758775","url":"https:\/\/batteryweb.com\/products\/pile-ras31-replacement-battery-72v-14500mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}