{"product_id":"mica-halogen-y216f-replacement-battery-6v-4000mah-ni-cd","title":"Mica Halogen Y216F Emergency Light Replacement Battery 6V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMica Halogen Y216F \/ MY0837F — 6V Ni-Cd Replacement Battery (30059216.00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 4000mAh Ni-Cd rechargeable battery for the Mica Halogen Y216F and MY0837F emergency lighting units. It replaces OEM part 30059216.00 when the original cell can no longer hold charge or fails a duration test. Voltage and capacity match the factory spec directly from Mica's product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY216F and MY0837F platform:\u003c\/strong\u003e\n    Both fittings share the same 6V charge rail, cell footprint, and connector pinout — which is why a single cell covers both models. The charge controller in each fitting expects a Ni-Cd chemistry response during float; substituting a different chemistry will cause the charge indicator to misread state of charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle and applied a load test. The BMS accepted the cell without a fault flag, and the charge indicator transitioned from red to green within the expected window after the cell voltage rose past the float acceptance threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle test requirement:\u003c\/strong\u003e\n    Within 24 hours of installation, hold the test button for the full rated duration. This lets the charge controller register the new cell's capacity and prevents a false failure on your next scheduled compliance inspection.\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 Ni-Cd cell does not arrive at full capacity — storage and shipping leave it partially discharged. The charge controller needs at least one complete charge cycle before the cell can deliver its rated 4000mAh under load. If you run a duration test too soon, the light will dim or cut out early, and the fitting logs a fail. Allow the unit to charge uninterrupted for 24 hours, then run the full test cycle from the test button before logging results for compliance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator staying red after new battery installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe charge controller in these Mica fittings reads cell voltage to decide whether to accept the new cell into float charge. A cell that has sat in a warehouse drops below the float acceptance window — typically under 5.4V for a 6V Ni-Cd pack — and the controller holds the fault state rather than switching to charge mode. Measure the cell terminal voltage with a multimeter; if it reads below 5.4V, apply a slow external charge at the correct Ni-Cd rate until it reaches approximately 6V, then reinstall. The charge indicator should transition to green within a few hours once the controller sees a voltage it can work with.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360315342938,"sku":"BWCS-MHY216LS-1","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360315375706,"sku":"BWCS-MHY216LS-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360315408474,"sku":"BWCS-MHY216LS-3","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MHY216LS-1.webp?v=1778611108","url":"https:\/\/batteryweb.com\/products\/mica-halogen-y216f-replacement-battery-6v-4000mah-ni-cd","provider":"BatteryWeb","version":"1.0","type":"link"}