MacBook battery drains overnight with the lid closed?
12 November 2026 · Mac guides
You closed your MacBook at night with plenty of charge, and in the morning the battery is much lower, the case feels warm, or the Mac will not wake up at all. A MacBook that is asleep should use very little power. When it does not, the cause is usually something keeping it awake, and that is often easy to find. Sometimes, though, it points to a tired battery or a hardware fault. This guide covers the safe checks to try at home, in a sensible order.
First, is it really a problem?
A sleeping MacBook still does a little work: it keeps memory powered and may check for messages and updates now and then. Losing a few per cent overnight is normal. It is worth investigating if:
- The battery drops by a large amount overnight, or goes flat over a weekend.
- The MacBook is warm, or the fan is running, when you take it out of a bag.
- It will not wake when you open the lid or press a key, and you have to hold the power button to restart it.
- It shuts down on its own while asleep and then starts up as if it had crashed.
A warm MacBook in a closed bag is the one to take seriously straight away. Heat with no airflow is hard on the battery, so until you have found the cause, shut it down fully before packing it.
If it will not wake up
Before anything else, get it running again:
- Connect the charger and leave it for at least 30 minutes. A battery that has run completely flat may show nothing at first.
- Open the lid and press a key or the power button.
- If nothing happens, press and hold the power button for about 10 seconds to force it off, then press it again to start it.
- On an Intel MacBook, an SMC reset can help with power and sleep faults. Apple's support site explains the method for your model. On a MacBook with Apple silicon, shutting down fully and waiting 30 seconds before starting up does the same job.
If it still shows no sign of life on the charger, this is no longer a sleep problem but a power fault. It needs a proper MacBook Pro or MacBook Air repair check, ideally before you try anything that could affect your files.
Find out what is keeping it awake
Most overnight drain is caused by an app, a setting or an accessory that stops the Mac sleeping properly.
Check Activity Monitor
Open Activity Monitor from Applications, then Utilities, and click the Energy tab. The Preventing Sleep column shows any app currently holding the Mac awake. Video calls, music players, backup tools, file syncing apps and some games are common examples. Quit the app before you close the lid, or check its own settings for a sleep option.
Look at the Battery settings
In System Settings, open Battery and look at Options. Settings such as waking for network access let the Mac wake briefly while asleep. They are useful on a desktop, but on a MacBook you can turn them off as a test and see whether the overnight drain improves.
Unplug accessories and test Bluetooth
USB hubs, external drives, docks and Bluetooth mice and keyboards can wake a Mac or stop it sleeping deeply. For one night, unplug everything and turn Bluetooth off before you close the lid. If the battery holds, add things back one at a time to find the culprit.
Ask the Mac what woke it
If you are comfortable with Terminal, the command pmset -g assertions lists what is stopping sleep right now, and pmset -g log | grep -i "wake reason" shows recent wake events. You do not need to understand every line. Repeated wake reasons pointing at the same thing, such as a USB device or Bluetooth, tell you where to look. These commands only read information and change nothing.
Rule out software
If the drain started after installing something new, or after a macOS update, try these:
- Install any waiting macOS updates, as sleep bugs are sometimes fixed in later releases.
- Check your login items in System Settings, under General, then Login Items, and remove anything you do not need.
- Start up in safe mode, which loads only essential software, and see whether sleep behaves overnight. If it does, something you have installed is the likely cause.
Check the battery itself
A worn battery holds less charge, so normal standby use takes a bigger bite out of it, and very worn batteries can make the Mac shut down without warning. In System Settings, open Battery and look at Battery Health. If it says Service Recommended, or the maximum capacity is well down, a new battery may be the real fix.
Look at the case too. If the trackpad has started to feel stiff or raised, the bottom case bulges, or the lid no longer closes flat, stop using the MacBook and switch it off. Those are signs of a swollen battery, which needs replacing promptly.
When it is a hardware fault
If you have ruled out apps, settings, accessories and the battery, and the MacBook still drains, gets hot, or fails to wake, the fault may be on the logic board. A faulty component in the power circuit can draw current when the Mac should be idle, and a problem with the sensor that tells the Mac the lid is closed can stop it sleeping at all. Liquid damage, even from a small spill months ago, is a common cause of exactly these symptoms.
These faults do not usually fix themselves, and a component that is drawing too much current can get worse. Our logic board repair works at chip level, so the faulty part can often be found and replaced rather than the whole board. If you are unsure where the problem lies, full diagnostics will tell you before you spend money on a battery you might not need.
Keep your files safe
A MacBook that shuts down unexpectedly or will not wake reliably is a good reason to check your backup today. Plug in a Time Machine drive and let it finish a full backup while the Mac is still working.
Get a quote
If your MacBook drains overnight, runs hot when closed or will not wake, call 020 7394 2525 or bring it to 80 Willow Walk, London SE1 5SY. We are open 9am to 6pm, Monday to Saturday, with bike collection in London and courier collection across the UK.