{"product_id":"bosch-rexroth-mke037-replacement-battery-36v-1200mah-li-socl2","title":"Bosch Rexroth MKE037 3.6V PLC Backup Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBosch Rexroth MKE037 \/ MKE047 \/ MKE098 — 3.6V Li-SOCl2 Replacement Battery (R911277133)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V lithium-thionyl chloride cell replaces the backup battery in Bosch Rexroth MKE037, MKE047, and MKE098 servo motors and their associated Rexroth drive controllers. It delivers 1200mAh (4.32Wh) to sustain SRAM program retention and real-time clock functions during main power loss. OEM part numbers R911277133 and R911281394 both cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMKE037 \/ MKE047 \/ MKE098 platform fit:\u003c\/strong\u003e\n    All three MKE series units share the same backup battery bay, connector pinout, and 3.6V SRAM retention rail. One cell covers the full platform — no adapter or rewiring needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the Rexroth BMS handshake and confirmed steady 3.6V delivery to the retention rail. The controller accepted the cell without a fault code on initial installation with the PLC powered and in RUN mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure — MKE series controllers:\u003c\/strong\u003e\n    Always replace this battery with the controller powered on and in RUN mode. SRAM is volatile — pull the cell while the PLC is off and the program is gone. If the PLC was off during the swap, reconnect to the programming device and reload the project from backup before restarting.\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 on Rexroth MKE controllers\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MKE series holds its program in static RAM, not flash. SRAM needs a live voltage source at all times — the backup battery is that source when mains power drops. If the battery is removed while the controller is off, the SRAM supply collapses within seconds and the program is erased. This is not a fault in the new cell — it is the result of a cold swap. Reconnect the programming device, reload the project file, and verify the RTC timestamp before returning the machine to service.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm not clearing after new cell is installed in Rexroth drive\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Rexroth IndraWorks diagnostic system latches a battery alarm flag independently of the cell's actual state. Fitting a new cell does not automatically clear the flag — the controller keeps the alarm active until it is acknowledged in software. Open IndraWorks DS or the relevant drive commissioning tool, navigate to the diagnostics or parameter screen, and reset the battery alarm manually. Confirm the cell voltage reads at or above 3.5V in the parameter list before clearing the flag.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415966482522,"sku":"BWCS-MKE047SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415966515290,"sku":"BWCS-MKE047SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415966548058,"sku":"BWCS-MKE047SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MKE047SL-1.webp?v=1779758652","url":"https:\/\/batteryweb.com\/products\/bosch-rexroth-mke037-replacement-battery-36v-1200mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}