Windows laptops typically last 3–5 years. MacBooks last 5–7 years. Battery degradation, thermal throttling, and software obsolescence are the main failure modes.
Laptops last 3–6 years on average, though this varies significantly by brand, build quality, and how the machine is used. Windows laptops from consumer brands typically last 3–5 years before performance or hardware forces replacement. Apple MacBooks with Apple Silicon chips last 5–7 years, benefiting from tight hardware/software integration and longer OS support windows. The battery is almost always the first component to fail — lithium-ion batteries are rated for 300–500 charge cycles, which typically happens within 2–3 years of heavy daily use. Battery replacement ($100–$200) can extend a laptop's useful life by 2–3 years if the rest of the hardware is still capable.
Replace a laptop when the battery replacement cost plus any other repairs exceeds 50% of a new machine's cost, when the operating system is no longer receiving security updates, or when the hardware cannot run essential software at acceptable speeds. A 5-year-old laptop with a failing battery and no security updates is both a productivity and security liability. If the hardware is otherwise sound, battery replacement alone can add 2–3 years.
Check your laptop's battery health before assuming the whole machine is failing. On Mac: hold Option and click the battery icon to see "Service Recommended" or percentage capacity. On Windows: run "powercfg /batteryreport" in Command Prompt to get a full battery capacity report. A battery at 40% original capacity explains most "slow laptop" complaints, and replacement is far cheaper than a new machine.
MacBooks typically last 5–7 years, and Apple Silicon (M1/M2/M3) models are expected to last even longer due to their efficiency and Apple's long iOS/macOS support windows. Apple provides OS updates for approximately 5–6 years after a model's release. The battery (rated ~1,000 cycles for M-chip models) typically starts showing degradation at year 3–4.
Yes — if the hardware is otherwise capable, battery replacement is almost always worth it. A new battery ($100–$200 for most laptops, $129–$199 for Apple service) typically adds 2–3 productive years. The break-even vs. a new $1,000 laptop is obvious. The only exception is if the laptop also can't run your required software or is missing security updates.
Heat is the primary laptop killer. Blocking vents (using on soft surfaces like beds), running CPU/GPU-intensive tasks without a cooling pad, and never cleaning dust from vents all dramatically shorten hardware life. Keeping a laptop plugged in at 100% charge constantly also accelerates battery degradation.
Gaming laptops typically last 3–5 years before the GPU becomes a bottleneck for modern games. The hardware may still function, but game performance at acceptable settings degrades. Gaming laptops also run hotter than regular laptops, which accelerates component wear if cooling is inadequate.
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