{"product_id":"motoman-hw9470917-b-replacement-battery-36v-5400mah-li-socl2","title":"Motoman HW9470917-B PLC Replacement Battery 3.6V 5400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotoman HW9470917-B — 3.6V Li-SOCl2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 5400mAh Li-SOCl2 cell replaces the backup battery in the Motoman HW9470917-B industrial controller. It maintains SRAM program memory and the real-time clock when mains power is lost. Swap it before the existing cell drops below the controller's SRAM retention threshold — typically signalled by a low-battery alarm on the teach pendant or operator panel.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHW9470917-B memory retention:\u003c\/strong\u003e\n    The controller holds ladder logic and system parameters in battery-backed SRAM. This cell supplies the float current that keeps that memory alive during outages. Once the cell voltage falls below the retention floor, the SRAM loses its contents and a full program reload is required.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed the cell ships at storage voltage — typically 3.55–3.58V open-circuit. Once installed in a powered controller, it rises to its rated 3.6V as the PLC float-charges it over several hours. BMS handshake is passive on this chemistry; the controller reads cell voltage directly with no authentication protocol.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eHot-swap procedure for this controller:\u003c\/strong\u003e\n    Always replace this cell with the HW9470917-B controller powered on and in RUN mode. Removing the cell while the controller is de-energised clears SRAM instantly. If the PLC was off during the swap, reconnect it to a programming device and reload the project file before restarting production.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the HW9470917-B loses program memory after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSRAM on this controller has no secondary hold-up capacitor large enough to bridge even a short power gap. The moment the cell is disconnected with the PLC de-energised, SRAM voltage collapses and all stored data is gone. Reconnecting a fresh cell does not restore the program — the hardware has no non-volatile fallback for ladder logic on this platform. The only recovery path is reloading from a connected programming device or from a backup stored on a CF card if the system was configured that way.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery alarm not clearing after a new cell is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe low-battery fault flag on the HW9470917-B does not clear automatically when a fresh cell is fitted. The alarm is latched in software and must be acknowledged manually — open the programming environment, navigate to the system fault log, and reset the battery alarm flag explicitly. Some firmware versions also require the controller to be cycled through a STOP-then-RUN transition before the status register updates. If the alarm persists after that, verify cell voltage at the connector is at or above 3.55V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415964680282,"sku":"BWCS-MHW947SL-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415964713050,"sku":"BWCS-MHW947SL-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415964745818,"sku":"BWCS-MHW947SL-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MHW947SL-1.webp?v=1779758652","url":"https:\/\/batteryweb.com\/products\/motoman-hw9470917-b-replacement-battery-36v-5400mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}