{"product_id":"custom-battery-packs-replacement-battery-48v-600mah-ni-mh","title":"4.8V Emergency Lighting Replacement Battery Pack 600mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 1\/2AA6004S1P — 4.8V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 600mAh Ni-MH replacement pack built to the same form factor as the original 1\/2AA6004S1P. It fits emergency lighting fixtures and exit signs that use this pack configuration in commercial buildings. Voltage and capacity match the OEM spec exactly — 4.8V at 600mAh (2.88Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEmergency lighting compatibility:\u003c\/strong\u003e\n    Exit signs and emergency backup fixtures in this class share a trickle-charge circuit tuned for 4.8V Ni-MH cell stacks. Swapping to a different voltage or chemistry trips the charge controller and the unit fails the next self-test cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on a Ni-MH compatible tester. The BMS held cutoff voltage correctly at both ends, and the pack reached rated capacity within the first two full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after install:\u003c\/strong\u003e\n    Emergency lighting charge circuits apply a low constant current. After swapping this pack, let the fixture complete one uninterrupted full charge before the next self-test. Interrupting the first charge cycle can leave the pack at storage voltage, which causes a false low-battery fault on the fixture's status indicator.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 4.8V on first use after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Ni-MH packs ship at storage voltage — typically 3.8V to 4.2V across a 4-cell stack. The emergency lighting unit reads this as a depleted or faulty pack and may log a fault before the first charge completes. This is not a defective pack. Connect the fixture to mains power and allow the trickle-charge circuit to run a full uninterrupted cycle. Voltage should stabilise at or above 4.8V once the cells are fully conditioned.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFixture status LED stays red after pack swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMost commercial emergency lighting units latch a fault code when they detect a pack change or a voltage drop below threshold. The red LED does not clear automatically — the unit needs to complete a full charge and then pass its self-test routine. After charging, press and hold the test button for five seconds to force a self-test cycle. If the LED clears and the fixture illuminates during the test, the pack is seated and charging correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333477662810,"sku":"BWCS-CM043SL-1","price":23.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43333477695578,"sku":"BWCS-CM043SL-2","price":26.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43333477728346,"sku":"BWCS-CM043SL-3","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM043SL-1.webp?v=1778212807","url":"https:\/\/batteryweb.com\/products\/custom-battery-packs-replacement-battery-48v-600mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}