Electrical safety lighting installations, specifically, backup safety lighting installations for use during power failures, lights with their own electrical power source, specifically, battery-powered lamps

'backup':6 'batteri':24 'battery-pow':23 'electr':1,19 'failur':14 'instal':4,9 'lamp':26 'light':3,8,15 'power':13,20,25 'safeti':2,7 'sourc':21 'specif':5,22 'use':11

Accumulators and batteries, battery monitoring and indicating apparatus, specifically, sensors for current, voltage and cycle number, and displays for battery charge state and capacity; battery charging apparatus, AC/DC and DC/AC converters, switching apparatus for automated selection of line or battery power sources; back-up electrical power systems comprised of batteries, controller and charging unit, sold together as a unit, electrical emergency warning lights

'ac/dc':28 'accumul':1 'apparatus':8,27,33 'autom':35 'back':44 'back-up':43 'batteri':3,4,20,25,40,51 'capac':24 'charg':21,26,54 'compris':49 'control':52 'convert':31 'current':12 'cycl':15 'dc/ac':30 'display':18 'electr':46,61 'emerg':62 'indic':7 'light':64 'line':38 'monitor':5 'number':16 'power':41,47 'select':36 'sensor':10 'sold':56 'sourc':42 'specif':9 'state':22 'switch':32 'system':48 'togeth':57 'unit':55,60 'voltag':13 'warn':63

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