{"product_id":"roma-rollladen-rolladen-replacement-battery-12v-2000mah-ni-mh","title":"Roma Rollladen 12V Ni-MH Compatible Battery PA000678","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRoma Rollladen Rolladen — 12V Ni-MH Replacement Battery (PA000678)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 2000mAh Ni-MH replacement battery for the Roma Rollladen Rolladen motorised roller shutter system. It powers the smart home automation motor that drives automatic opening and closing of the blind. Capacity is 2000mAh (24Wh), matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRoma Rollladen Rolladen compatibility:\u003c\/strong\u003e\n    The OEM part number PA000678 ties this cell to the Rollladen Rolladen motor controller. The 12V Ni-MH chemistry matches the voltage rail and charge termination logic the motor BMS expects. Swapping to a different chemistry would cause incorrect charge cutoff and possible controller fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through a full charge and discharge sequence, confirming the BMS accepted the cell without fault flags. Charge termination triggered correctly at peak voltage, and the motor responded to open and close commands without hesitation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install network re-join:\u003c\/strong\u003e\n    After fitting this battery, wait at least 60 seconds before expecting the roller shutter to respond to hub commands. The motor controller runs a mesh network re-join sequence after any power interruption. Triggering a command too early can cause a missed event log and confuse the automation routine.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Rollladen motor stops responding mid-automation after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells fresh from storage often sit below the controller's minimum operating voltage threshold, typically around 10.8V for a 12V pack. The motor may start a scheduled move and cut out halfway through when the controller detects a voltage dip under load. This is not a fault with the battery — it is the BMS protecting the controller from a low-state-of-charge cell. Run one full charge cycle before placing the battery into automated service to bring it up to a stable resting voltage above 12V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alert appearing immediately after fitting a new PA000678 cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSmart home hubs read battery state from the last reported voltage, not from physical detection of a new cell. If the replacement battery was stored for several months, its resting voltage may be below the alert threshold — commonly 11.4V for this pack. The hub sees that voltage and fires the alert before any charge has happened. Charge the battery fully first, then re-seat it. The alert should clear once the hub polls and reads a voltage above 12V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416144281690,"sku":"BWCS-RMD678SL-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416144314458,"sku":"BWCS-RMD678SL-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416144347226,"sku":"BWCS-RMD678SL-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RMD678SL-1.webp?v=1779760485","url":"https:\/\/batteryweb.com\/products\/roma-rollladen-rolladen-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}