{"product_id":"rp-technik-nimhht4820q-replacement-battery-48v-2000mah-ni-mh","title":"RP-Technik NIMHHT4820Q Replacement Battery 4.8V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRP-Technik NIMHHT4820Q — 4.8V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 2000mAh Ni-MH replacement cell for RP-Technik emergency lighting units specified under the NIMHHT4820Q designation. It fits emergency exit signs, evacuation luminaires, and backup lighting fixtures that switch to battery power on mains failure. Voltage and capacity match the original cell exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNIMHHT4820Q platform fit:\u003c\/strong\u003e\n    RP-Technik emergency fittings in this series use a 4.8V Ni-MH pack wired to a trickle-charge controller that expects a specific float voltage range. Swapping to a different voltage or chemistry causes the charge controller to misread cell state and either overcharge or refuse to charge at all.\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-discharge cycle on a compatible fitting. The charge controller accepted the cell without fault, the float voltage stabilised within the expected window, and the BMS handed off cleanly to standby.\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 confirms the cell accepts load and lets the charge controller register the new capacity before your next scheduled compliance check.\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-MH cell that has been in storage will not deliver its full rated capacity on the first activation. The cell needs one complete charge-discharge cycle to reach the 2000mAh figure. If you run a compliance test immediately after fitting and the light cuts out early, that is a conditioning issue, not a faulty battery. Charge the fitting for a full 24 hours, then repeat the duration test at full load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator staying red after confirmed good installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell arriving from storage can sit at a resting voltage outside the float acceptance window the charge controller expects. When this happens, the controller reads the cell as faulty and holds the fault or red-charge LED on. The fix is to leave the fitting powered on mains for 24 hours — the controller's trickle stage will bring the cell into range and the indicator should shift to green once float voltage is reached. If the red LED persists beyond 48 hours, check the cell connector seating and confirm no pins are bent.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360423018586,"sku":"BWCS-RGA003LS-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360423051354,"sku":"BWCS-RGA003LS-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360423084122,"sku":"BWCS-RGA003LS-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RGA003LS-1.webp?v=1778614656","url":"https:\/\/batteryweb.com\/products\/rp-technik-nimhht4820q-replacement-battery-48v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}