What Is APC Smart UPS 750 Battery?

The APC Smart UPS 750 battery is a sealed lead-acid (SLA) rechargeable battery designed for uninterrupted power supply systems. It provides backup power during outages and stabilizes voltage fluctuations, typically using 12V configurations with capacities ranging from 7Ah to 9Ah depending on runtime requirements. These maintenance-free batteries prioritize surge protection for connected devices like servers and network equipment, with a typical lifespan of 3–5 years under proper cycling conditions.

What chemistry does the APC Smart UPS 750 use?

This UPS employs valve-regulated lead-acid (VRLA) technology with absorbed glass mat (AGM) design. The SLA chemistry balances affordability with reliable short-term power delivery, while the sealed construction prevents acid leakage and enables vertical/horizontal installation flexibility.

How long does the battery last during outages?

Runtime depends on connected load and battery health. At full 750VA/450W load, expect 2–5 minutes for standard configurations. Reducing load to 50% extends operation to 10–15 minutes. Pro Tip: Use APC’s Runtime Calculator with your equipment wattage for precise estimates.

Can lithium batteries replace the original SLA?

While possible, lithium conversions require voltage compatibility checks and charging profile adjustments. LiFePO4 batteries offer 2× longer lifespan but cost 3× more upfront. The UPS’s charging circuit must support lithium’s narrower voltage range (14.4–14.6V vs. SLA’s 13.5–13.8V float).

What maintenance ensures optimal performance?

Quarterly capacity tests and terminal cleaning are essential. Use a multimeter to verify each cell stays above 12.4V at rest. For example, a battery showing 12.1V under no load has likely lost 30% capacity and should be replaced. Keep ambient temperatures below 25°C—every 8°C increase halves battery life.

How does temperature affect the battery?

High temperatures accelerate grid corrosion while cold reduces ion mobility. At 35°C, capacity degrades 50% faster than at 20°C. Conversely, below 0°C, available capacity drops 20–40%. Always position the UPS away from heat sources like server exhaust vents.

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