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Learning how to turn on Apple Watch takes about three seconds: hold the side button until the Apple logo appears. If that worked for you, you are done and the rest of this page is not for you.
Most people searching this are here because it did not work — the screen stayed black, or a red lightning bolt appeared. And the advice almost every guide gives at that point, force restart, is usually the wrong first move.
How to Turn On Apple Watch: the basic method
This is the same on every model, from a Series 3 to the current Series 12, Ultra 4 and SE 3.
- Find the side button — the flat, elongated button below the Digital Crown (the round dial).
- Press and hold it until the Apple logo appears. This normally takes a few seconds, and you should keep holding rather than tapping.
- Let go and wait for the watch to finish starting up. Booting can take up to a minute.
On an Ultra model, the rugged casing means the button can feel stiffer than you expect. Use the side button, not the orange Action button — the Action button does not power the watch on.
The mistake: reaching for a force restart first
When the screen stays black, the standard internet advice is to hold the Digital Crown and side button together for ten seconds. That is a real procedure, but it is the wrong thing to try first, and it wastes time when the actual problem is a flat battery.
Apple’s own guidance on this is specific: if you see a red lightning bolt, the watch does not have enough power to turn on, and you may need to charge it for up to 30 minutes before it will turn on at all.
Thirty minutes is far longer than most people wait. Plenty of “my Apple Watch is dead” conclusions are really a watch that was given five minutes on the charger and then declared broken.
Do this instead, in this order
- Put the watch on its magnetic charger and check that the charging symbol appears on screen.
- Leave it there for at least 30 minutes without touching it.
- Try the side button again while it is still on the charger.
- Only if that fails should you try a force restart.
What the symbols on a black screen mean
A watch that will not turn on usually tells you why, if you know what you are looking at.
- Red lightning bolt — not enough battery to start. This is a charging problem, not a fault.
- Red lightning bolt inside a ring — Apple describes this as what the bolt changes to once charging has begun. It means the charger is connected properly and working.
- Apple logo that appears then disappears repeatedly — this is a software issue rather than a power issue, and is the case where a force restart genuinely is the right step.
- Nothing at all, even after 30 minutes charging — suspect the charger or cable before the watch.
Charging problems that look like a dead watch
Before assuming a hardware failure, rule out the cheap explanations. They account for a large share of watches that refuse to power on.
- The magnetic puck is not seated. It should snap flat against the back of the watch. A case, a thick strap fold or a slight offset can break contact.
- The back of the watch is dirty. Sweat and skin oil build up on the sensor surface. Wipe both the watch back and the charger face.
- The cable is failing. Test the same cable on another device, or try a different cable on the watch. Fraying near the USB end is common.
- The power source is too weak. Try a wall adapter rather than a laptop port or a low-output power bank.
Restart and force restart: two different things
These get confused constantly, and using the wrong one is why people think restarting “did not help”.
Normal restart
Use this when the watch responds but is misbehaving.
- Press and hold the side button until the power options appear.
- Drag the Power Off slider to the right.
- Wait for the screen to go black, then hold the side button until the Apple logo appears.
Force restart
Use this only when the watch is frozen or stuck on the Apple logo, and only after you have ruled out a flat battery.
- Hold the Digital Crown and the side button at the same time.
- Keep holding for at least 10 seconds — longer than feels natural.
- Release when the Apple logo appears.
A force restart does not erase anything. It is not the same as a factory reset — if you actually need to wipe the watch, see our guide on how to reset Apple Watch, which covers the Activation Lock trap that catches people selling a watch on.
How to turn an Apple Watch off
Hold the side button, then drag the Power Off slider. On current watchOS versions the same screen also gives you Medical ID, Emergency SOS and Low Power Mode, which is why a quick press-and-release will not do it — you need to hold.
One thing worth knowing: you cannot power the watch off while it is connected to its charger.
When it is genuinely a hardware problem
Contact Apple Support rather than continuing to troubleshoot if you see any of these.
- The screen stays black after 30 minutes on a charger you have confirmed works with another device.
- The watch only stays on while physically connected to the charger and dies the moment you remove it.
- The watch becomes noticeably hot while charging.
- The back panel is separating from the body, or the screen is lifting at an edge — this can indicate a swollen battery and should be looked at rather than pressed on.
Keeping the battery healthy afterwards
Once your watch is running again, a few habits reduce the chance of repeating this.
- Keep watchOS updated — power management improves between releases.
- Use Low Power Mode on long days rather than letting the watch run flat.
- Turn off the Always-On Display if you do not use it.
- Check your battery health occasionally — our guide on how to check battery on Apple Watch covers where the maximum capacity figure lives.
Frequently Asked Questions (FAQs)
How do I turn on Apple Watch?
Press and hold the side button, below the Digital Crown, until the Apple logo appears, then wait for it to finish starting up. The method is identical across models.
Why won’t my Apple Watch turn on even though I charged it?
The most likely reason is that it was not charged for long enough. Apple’s guidance is that a watch showing the red lightning bolt may need up to 30 minutes of charging before it will turn on. Confirm the charging symbol appears on screen, which tells you the puck is actually connected.
What does the red lightning bolt mean?
It means the battery is too low for the watch to start. Apple notes that once charging begins, the bolt changes to a red lightning bolt inside a ring.
Can I turn on my Apple Watch without the side button?
The side button is the normal way to power the watch on, and there is no menu or iPhone setting that does it remotely. If the side button itself is damaged, that is a repair matter rather than something to work around.
How long does an Apple Watch take to turn on?
From a normal shutdown, expect roughly half a minute to a minute. From a completely flat battery, add the charging time first — up to 30 minutes before it will start at all.
Does a force restart delete my data?
No. A force restart just reboots the watch. Erasing content and settings is a separate action and is the one that removes your data.
Is it safe to leave my Apple Watch charging overnight?
Apple Watch manages its own charging and stops drawing a full charge once topped up, and recent watchOS versions include an optimised charging feature intended to reduce battery ageing. Overnight charging is a normal usage pattern.
My watch only works while on the charger. What is wrong?
That pattern points to a battery that no longer holds a charge. It is a service issue rather than something a restart will fix.
Sources
- Apple Support — If your Apple Watch won’t charge or turn on
- Apple — Apple Watch current model lineup
