Buying a used smartwatch: what to check before you pay

Battery health: check it, don't take their word for it

On Apple Watch, open the Watch app on the paired iPhone and check General → About → Battery, which shows actual capacity against new. On Samsung Galaxy Watch, find it in device settings under Battery care.

If no capacity figure is available, charge the watch fully and use it for a normal day: if it dies by noon while the manufacturer promises all-day life, the battery is worn out.

Account locks: without a sign-out, it is just plastic

An Apple Watch is tied to the previous owner's Apple ID through Activation Lock: the seller must sign out and remove the watch in the Watch app on their iPhone before selling, otherwise it stays permanently locked and useless to you after a reset.

The same applies to Samsung and Wear OS watches: the device must be signed out of the previous owner's Samsung or Google account. Ask the seller to do a factory reset while you watch, so you see it set up without issues.

Water resistance fades with age

A water resistance rating (say 5 ATM or 50 m) applies to a new watch with intact seals. The rubber gaskets around the case and buttons shrink over time and with temperature swings, so an older watch no longer handles the same exposure it did on day one, even though the manufacturer sticker is unchanged.

Ask the seller whether they wore the watch in the shower or while swimming. Condensation under the glass or a foggy display after contact with water is a clear sign the seal no longer holds.

Sensors, buttons and haptics

• ·Check heart rate: it should settle on a sensible number during a short walk, not a fixed value or an oddly jumpy one.
• ·Test GPS outdoors: the location should lock in under a minute.
• ·Press every button and the crown; a sticky crown or a button that will not click is often an expensive fault.
• ·Turn on the haptic (vibration) alert in settings; a weak or missing buzz points to a worn-out motor.

Charger, band and accessories

Chargers differ between generations of the same watch, so confirm you get the correct cable for this exact model; without it, a replacement charger is an extra cost. The band is a wear item and cheap to replace, so it should not be a reason to walk away from an otherwise good deal.

What our condition grade means

Every watch we buy gets graded A, B or C: A means like new, no visible wear and a healthy battery; B means normal scuffs on the band or case that do not affect function; C means clearly used or with a fault we describe plainly in the listing. Every watch is also factory reset before it goes back on sale, so no previous owner account is still linked to it.

Selling or buying a watch with us?

We run the same checklist when we buy a watch from you: we inspect it, grade it and offer a fair price. Looking to buy one instead? You will find checked and graded watches in our shop.