Every laptop battery wears out. How fast depends mostly on heat and on how you charge it. These habits slow the wear down, and the last section tells you how to know when a battery is finished rather than just tired.
Keep it cool
Heat ages a battery faster than anything else. Use the laptop on a desk or a hard tray, never on a bed or a cushion that blocks the vents. If the fan runs loud all the time, the vents are probably full of dust, and a clean makes a bigger difference to battery life than any software setting. Leave the laptop out of a hot car and away from a window in the afternoon sun.
Stop draining it to zero
Modern batteries prefer small, regular top-ups to full cycles. Plug in when the laptop reaches about 20 percent rather than waiting for it to shut down. Storing a laptop flat for weeks is the one thing that can kill a healthy battery outright, so if you are putting a machine away, leave it around half charged and top it up once a month.
Use the charge limit if your laptop has one
Many laptops can stop charging at 80 percent, which helps if the machine lives on a desk plugged in all day. Look for it under Battery Health on a Mac, in Lenovo Vantage, Dell Power Manager, MyASUS or HP Support Assistant on Windows. Turn it off again before a day away from a socket.
Trim what runs in the background
Lower the screen brightness a notch, close the browser tabs you are not reading, and switch off Bluetooth when nothing is paired. On Windows, set the power mode to Balanced or Best power efficiency. On a Mac, open Activity Monitor and check the Energy tab for the app that is using the most. These are small gains each, but together they add an hour to a working day.
Use the right charger
A cheap charger with the wrong voltage, or a USB-C charger with too little power, makes the battery work harder and runs hot. Match the wattage printed on the original charger or the sticker under the laptop. A weak charger is also why some laptops show “plugged in, not charging”.
How to tell it is finished
A battery that drops from 40 percent to nothing in a minute, or a laptop that only works on the charger, has cells that are worn out. A battery that has started to swell, which you notice as a trackpad that no longer clicks or a back cover that bulges, must be replaced straight away and should not be charged in the meantime. In both cases the fix is a new battery. Send us your laptop model on WhatsApp and you will get a price and a fitting time before you come in.