{"product_id":"duceri-3-6v-900mah-ni-cd-emergency-light-battery-series-configuration","title":"Duceri 3.6V 900mAh Ni-Cd Emergency Light Battery - Series Configuration","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Duceri 3.6V 900mAh is a nickel-cadmium rechargeable battery pack configured in series for emergency lighting systems, specifically designed as a replacement for the Duceri EMLED3WMHBULK emergency LED bulkhead range. The battery consists of three individual Ni-Cd cells connected in series to deliver 3.6V nominal output at 900mAh capacity, with red and black flying leads terminating in a connector compatible with Duceri emergency lighting charge circuits.\u003c\/p\u003e\n\u003cp\u003eEmergency lighting legislation requires backup batteries to maintain illumination during mains failure. This battery pack sits inside the emergency fitting connected to a trickle-charge circuit that keeps it topped up during normal operation, then powers the LED lamp when mains supply is interrupted. The 900mAh capacity provides approximately 3 hours of emergency runtime depending on the lamp load and state of charge, meeting BS 5266 requirements for non-maintained emergency lighting in most residential and light commercial installations.\u003c\/p\u003e\n\u003cp\u003eNickel-cadmium chemistry offers reliable performance across a wide temperature range and tolerates deep discharge cycles better than some alternative chemistries, making it well-suited to emergency lighting where the battery may remain on standby for months between discharge events. The battery pack measures approximately 200mm in length, designed to fit within the Duceri bulkhead housing without modification. The series configuration means the three internal cells share current load equally, distributing wear and extending service life compared to parallel configurations under the same load.\u003c\/p\u003e\n\u003cp\u003eESP recommends replacing emergency lighting batteries every 3-4 years or when runtime testing shows capacity has degraded below acceptable levels. The battery weighs 64g and should be disposed of through an appropriate battery recycling facility at end of life due to the cadmium content.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Net Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e0.064\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Gross Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e0.064\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Gross Weight (KG)\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Length (mm)\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Width (mm)\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Height (mm)\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Length (mm)\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width (mm)\u003c\/td\u003e\n\u003ctd\u003e385\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Height (mm)\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/products_EMBAT3.6V900SER_datasheet.pdf\" target=\"_blank\"\u003eProduct Specification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does the battery last on a full charge?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRuntime depends on the LED lamp load in the emergency fitting. With the EMLED3WMHBULK 3W bulkhead, a fully-charged 900mAh battery typically provides approximately 3 hours of emergency illumination, meeting BS 5266 standards for non-maintained emergency lighting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should emergency lighting batteries be replaced?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eESP and industry guidance recommend replacing Ni-Cd emergency lighting batteries every 3-4 years regardless of apparent performance, as capacity degrades over time even with minimal use. More frequent replacement may be needed in high-temperature environments or where monthly testing shows reduced runtime.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this battery compatible with other emergency light fittings?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis battery is designed specifically for Duceri emergency lighting systems using the EMLED3WMHBULK bulkhead. While the 3.6V voltage and connector may physically fit other fittings, using it outside the specified application may result in incorrect charging profiles, reduced runtime or damage to the fitting. Always match replacement batteries to the manufacturer's specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I dispose of this battery in household waste?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Nickel-cadmium batteries contain cadmium, a heavy metal regulated under waste disposal legislation. The battery must be taken to a household waste recycling centre with a battery collection point, or returned to a retailer operating a battery take-back scheme.\u003c\/p\u003e","brand":"ESP","offers":[{"title":"Default Title","offer_id":45294066794763,"sku":"EMBAT3.6V900SER","price":3.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/EMBAT3.6V900SER_7f8a4ed9-10e4-4fca-9545-42dc0c76c337.jpg?v=1714667722","url":"https:\/\/niori.co.uk\/products\/duceri-3-6v-900mah-ni-cd-emergency-light-battery-series-configuration","provider":"Niori","version":"1.0","type":"link"}