How Long Does a Laptop Battery Last?
Quick Answer
A laptop battery typically lasts 2–5 years, or about 300–1,000 charge cycles, before it noticeably loses capacity. On a single charge, most laptops run 4–12 hours depending on the model and workload.
Duration by Type
About 300–1,000 charge cycles
Quick Answer
There are two ways to read this question. Over its lifespan, a laptop battery generally lasts 2–5 years, or roughly 300–1,000 full charge cycles, before its capacity drops enough to need replacement. On a single charge, most modern laptops run 4–12 hours depending on the model, screen brightness, and what you're doing. Lightweight ultrabooks often exceed 10 hours, while gaming laptops may last only 2–4 hours under load.
Battery Life on a Single Charge
| Laptop Type | Typical Runtime per Charge |
|---|---|
| Ultrabook / thin-and-light | 8–15 hours |
| Mainstream productivity laptop | 6–10 hours |
| Business laptop | 8–12 hours |
| Gaming laptop | 2–5 hours |
| Chromebook | 8–14 hours |
| MacBook (Apple silicon) | 12–20+ hours |
Battery Lifespan (Overall)
Lithium-ion batteries wear out with use and age. Manufacturers rate them by charge cycles — one cycle equals a full 0–100% discharge and recharge (which can be spread across several partial charges).
| Cycle Count | Typical Capacity Remaining |
|---|---|
| New | 100% |
| ~300 cycles | ~90% |
| ~500 cycles | ~80% (common warranty threshold) |
| ~1,000 cycles | ~70% or less |
Most laptops reach 300–500 cycles within 2–3 years of regular use.
Factors That Affect Battery Life
- Screen brightness — The display is usually the biggest single power draw.
- Workload — Video editing, gaming, and many browser tabs drain faster than word processing.
- Heat — High temperatures permanently degrade lithium-ion cells.
- Charging habits — Constantly charging to 100% or draining to 0% accelerates wear.
- Background apps — Sync services, updates, and startup programs consume power.
- Battery age — Chemistry naturally degrades over time, even with light use.
- Connectivity — Wi-Fi, Bluetooth, and keyboard backlighting all add up.
How to Extend Battery Life and Lifespan
- Keep charge between 20% and 80% when possible; many laptops offer a charge-limit setting.
- Lower screen brightness and enable battery-saver mode.
- Avoid extreme heat — don't leave a laptop in a hot car or block its vents.
- Close power-hungry background apps and unused browser tabs.
- Update your OS and drivers, which often include power-efficiency improvements.
- Unplug accessories you're not using.
When to Replace the Battery
Consider a replacement when the battery holds well under 80% of its original capacity, drains unusually fast, shuts down unexpectedly, or physically swells. A swollen battery is a safety hazard — stop using the laptop and have it serviced. On most Windows laptops you can generate a battery health report; macOS shows cycle count and condition under System Settings.
Pro Tips
Keep the charge between 20% and 80% and use a charge-limit setting if your laptop offers one.
— Apple
Lower screen brightness and turn on battery-saver mode to extend runtime immediately.
— Dell
Stop using and service any laptop with a swollen battery — it's a safety hazard.
— Consumer Reports
Quick Facts
One charge cycle equals a full 0–100% discharge, which can be spread across several partial charges.
Source: Apple
Many manufacturers rate batteries to retain about 80% capacity after roughly 500 cycles.
Source: Apple
The display is usually the single largest power draw on a laptop.
Source: Consumer Reports