{"product_id":"dotlux-exitflat-replacement-battery-32v-1800mah-lifepo4","title":"DOTLUX EXITflat 5411 LiFePO4 Replacement Battery 3.2V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDOTLUX EXITflat \/ EXITmulti Series — 3.2V LiFePO4 Replacement Battery (5411, 5405)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.2V 1800mAh LiFePO4 cell for the DOTLUX EXITflat and EXITmulti emergency exit light fittings. It replaces OEM part numbers 5411 and 5405, and also fits model references 5406 and 3177-160120. When mains power fails, this cell drives the LED panel to keep the exit sign illuminated for evacuation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEXITflat and EXITmulti platform fit:\u003c\/strong\u003e\n    Both the EXITflat and EXITmulti share the same 3.2V single-cell LiFePO4 architecture, charge controller float voltage, and JST-style connector footprint — which is why one cell covers the full model range listed above.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and a load-discharge run on the EXITflat fitting. The onboard charge controller accepted the cell without fault, and the BMS held steady through the discharge curve without triggering a low-voltage cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst test cycle after installation:\u003c\/strong\u003e\n    Within 24 hours of fitting this cell, hold the test button for the full rated duration. This lets the charge controller register the new cell's capacity window before your next scheduled compliance inspection — skipping this step can result in a failed duration test even with a healthy cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEmergency light failing its duration test after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed LiFePO4 cell arrives in storage-state, typically sitting between 3.0V and 3.1V — below the charge controller's float acceptance threshold on some DOTLUX fittings. The controller may pass a trickle charge rather than a full charge cycle, meaning the cell never reaches rated capacity before the test is triggered. Allow the fitting at least 24 hours on mains power before running any duration test. If the cell still falls short, check terminal voltage at the connector — it should read 3.2V fully charged.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator staying red after new cell installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome DOTLUX EXITflat fittings latch a fault state in the charge controller firmware when the old cell drops below a hard low-voltage floor — usually around 2.5V. Swapping the cell alone does not clear this latched fault. On most units, holding the test button for three seconds with the new cell connected and mains power live will reset the controller and allow the indicator to cycle to green. If the red LED persists after the reset, confirm the cell connector polarity is seated correctly before assuming a controller fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360388382810,"sku":"BWCS-DTX541LS-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360388415578,"sku":"BWCS-DTX541LS-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360388448346,"sku":"BWCS-DTX541LS-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DTX541LS-1.webp?v=1778611141","url":"https:\/\/batteryweb.com\/products\/dotlux-exitflat-replacement-battery-32v-1800mah-lifepo4","provider":"BatteryWeb","version":"1.0","type":"link"}