{"product_id":"legrand-6600-03-replacement-battery-6v-2000mah-ni-cd","title":"Legrand HB00015TA 6V Emergency Lighting Replacement Battery 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLegrand 6600 Series — 6V Ni-CD Replacement Battery (HB00015TA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 2000mAh Ni-CD replacement battery for Legrand 6600 03, 6600 04, and 6600 05 emergency lighting units. OEM part numbers HB00015TA and 061885 cross-reference directly to this cell. It restores the backup illumination function that activates when mains power fails.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6600 03, 04, and 05 compatibility:\u003c\/strong\u003e\n    All three models share the same 6V charge rail, cell format (210.40 × 23.00 × 23.00mm), and charge controller handshake — one cell fits all three 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 a mains-failure simulation. The charge controller accepted the cell voltage, moved from bulk charge to float, and the fitting activated correctly on loss of supply.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst test cycle after installation:\u003c\/strong\u003e\n    Within 24 hours of fitting, hold the test button for the full rated duration. This lets the charge controller register actual cell capacity before the next scheduled compliance inspection — skipping it risks a false fail on the duration test.\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  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed Ni-CD cell ships in a partial state of charge after months in storage. The charge controller in the 6600 series enters float at a fixed voltage threshold, not at full cell capacity. Until one complete charge-discharge cycle has run, the cell delivers less than its rated 2000mAh under load. Run a full manual test cycle on installation day and allow the fitting to recharge for 24 hours before the formal compliance test.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator staying red after new battery is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 6600 series charge controller checks incoming cell voltage before committing to a charge cycle. A cell sitting at low voltage from long storage can fall outside the controller's float acceptance window, so the indicator stays red rather than transitioning to green. This is not a faulty cell — it is the controller refusing to start. Disconnect the cell, wait 30 seconds, reconnect, and the controller will retry; most cells recover to an accepted voltage range within the first hour of trickle charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360396050522,"sku":"BWCS-LGH885LS-1","price":60.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360396083290,"sku":"BWCS-LGH885LS-2","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360396116058,"sku":"BWCS-LGH885LS-3","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LGH885LS-1.webp?v=1778611162","url":"https:\/\/batteryweb.com\/products\/legrand-6600-03-replacement-battery-6v-2000mah-ni-cd","provider":"BatteryWeb","version":"1.0","type":"link"}