UPS (UPS)
Also known as: Uninterruptible Power Supply · UPS battery · backup power unit · inverter UPS
Uninterruptible Power Supply — a backup power unit that provides emergency electricity when the main supply fails. UPS units are common e-waste containing lead-acid or lithium batteries, copper transformers, and PCBs, each requiring separate handling at end-of-life.
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What is UPS?
UPS stands for uninterruptible power supply, a backup electrical device that delivers continuous power to a load (computer, server, telecom rack, medical equipment) during mains failure or voltage instability. Three architectures exist: offline (or standby) UPS for home computers, line-interactive UPS for small offices, and online double-conversion UPS for data centres and critical loads. India has a large installed base because of frequent grid disturbances, and end-of-life UPS units form a significant share of the commercial e-waste stream.
What is inside a UPS: A typical 1 kVA line-interactive UPS weighs 8-12 kg. Of this, 60-70% by mass is one or two sealed lead-acid (SLA) batteries — usually 12 V, 7-9 Ah each; 10-15% is a copper-wound toroidal or laminated steel transformer; 8-10% is the steel chassis; 5-8% is the inverter and charger PCB carrying MOSFETs, IGBTs, electrolytic capacitors, and a controller IC; and the balance is plastic enclosure and cable. Larger online UPS units used in data centres (10-100 kVA) replace the SLA stack with a lithium-iron-phosphate or lithium-cobalt battery bank, raising both the value and the safety hazard at end-of-life.
End-of-life handling: Indian E-Waste (Management) Rules, 2022 list UPS under Schedule I, and lead-acid batteries are governed in parallel by the Battery Waste Management Rules, 2022. The battery must be removed first, intact, and channelised to a CPCB-authorised lead smelter for closed-loop recovery — lead has 95%+ recyclability and a stable scrap value of Rs 130-160 per kg. The copper-wound transformer is the second highest-value fraction (Rs 700-900 per kg as separated copper). The PCB goes to standard precious-metal recovery; the plastic enclosure to mechanical recycling.
Failure modes: Lithium-bearing data-centre UPS units present significant thermal-runaway risk if dropped, crushed, or short-circuited during dismantling. Acid leakage from cracked SLA batteries is the most common workplace hazard at informal sites. Both risks require dedicated PPE, fire-suppression infrastructure, and trained dismantling staff.
Common questions about UPS
Plain-English answers to what people most often ask.
What is the full form of UPS?
What batteries does a UPS contain?
Are UPS units covered under India's E-Waste Rules?
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