{"product_id":"honeywell-sec-h-600-replacement-battery-12v-300mah-ni-mh","title":"Honeywell SEC-H-600 Replacement Battery 12V 300mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHoneywell SEC-H-600 \/ SEC-H-201 — 12V Ni-MH Replacement Battery (H10499)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 300mAh Ni-MH replacement battery for the Honeywell SEC-H-600 and SEC-H-201 security control panels. It replaces OEM part number H10499. The battery provides backup power to maintain panel memory and emergency signaling during a mains power failure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSEC-H-600 and SEC-H-201 compatibility:\u003c\/strong\u003e\n    Both panels share the same battery bay dimensions, connector pinout, and float charge voltage rail. A single H10499-spec cell works across 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 through charge acceptance and BMS handshake on the SEC-H-600 panel. The panel accepted the charge cycle cleanly and cleared its low-battery fault after the float charge period completed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation conditioning on alarm panels:\u003c\/strong\u003e\n    Do not run a zone or siren test immediately after fitting this cell. Allow 24–48 hours on float charge first. A new Ni-MH cell at partial charge will cause the panel to log a low-battery event during a test, which can be mistaken for a faulty battery.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlarm panel losing programming during a power outage after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the panel drops its zone programming or user codes when mains power cuts out, the new battery has not yet been fully accepted into float charge. A freshly installed Ni-MH cell at low state of charge cannot sustain the panel's EEPROM write voltage under load. The fix is straightforward: leave the panel powered on mains for 48 hours before the next outage or test. After that conditioning period, the cell holds enough charge to back up memory without interruption.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePanel still showing low battery fault 24 hours after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the panel's charge supervision circuit has not yet seen the cell reach its float threshold. Honeywell panels sample battery voltage at a fixed interval and need to log a clean reading above the low-battery trip point — typically around 10.5V under light load — before clearing the fault. Check that the connector is fully seated and no pins are bent. If the fault persists past 48 hours on mains power, measure the cell voltage directly: a healthy charged cell should read between 13.2V and 14.4V at rest.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43309822312538,"sku":"BWCS-HYC600BT-1","price":35.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43309822345306,"sku":"BWCS-HYC600BT-2","price":41.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43309822378074,"sku":"BWCS-HYC600BT-3","price":45.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HYC600BT-1.webp?v=1777868235","url":"https:\/\/batteryweb.com\/products\/honeywell-sec-h-600-replacement-battery-12v-300mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}