Should I keep my laptop plugged in all the time?
How modern batteries work
Most laptops today use lithium-ion batteries, which degrade over time and with heat. Keeping a laptop plugged in at 100% all the time can stress the battery, especially if it gets hot. However, many manufacturers include battery health features that stop charging at a certain level (often 80%) when plugged in for long periods.
You won't damage the laptop by leaving it plugged in, but you may shorten the battery's lifespan. If you rarely use the battery, it's better to enable a charge limit if available.
- Lithium-ion batteries age faster at 100% and high heat
- Charge limits (e.g., 80%) reduce stress
- Heat is the biggest enemy of battery life
Best practices
If you use your laptop as a desktop replacement, keep it plugged in but enable the battery charge limit in your laptop's settings (e.g., Lenovo Vantage, Dell Power Manager, or macOS optimized charging). If you don't have that feature, unplug it once in a while and let it discharge to around 50% before plugging back in.
Avoid using the laptop on soft surfaces that trap heat, and don't leave it in a hot car. If you're storing the laptop for a long time, charge it to about 50% and turn it off.
- Enable charge limit if available
- Unplug occasionally to let battery discharge
- Keep it cool
- Store at 50% charge for long periods
Common mistakes
- Believing that keeping a laptop plugged in will 'overcharge' and destroy the battery—modern devices have protection circuits.
- Always draining the battery to 0% before recharging, which is unnecessary and can actually harm lithium-ion batteries.
- Ignoring heat: using a laptop on a bed while charging can cause overheating and faster battery degradation.
