How Long Does an Apple Watch Battery Last?

Apple keeps two ideas apart. "Battery life" is the amount of time a device runs before it needs to be recharged, and "battery lifespan" is the amount of time a battery lasts until it is no longer useful. Apple adds that watch battery life depends on many factors, including the age of your watch and how you use it. If yours runs down faster than it used to, start with the fixes for Apple Watch battery life problems.

Apple Watch battery lifespan is the time until the watch battery is no longer useful and needs replacing. When the battery itself is worn, the guide to Apple Watch battery replacement options has Apple's service routes and prices.

Apple Watch Battery Life by Model

Apple Watch battery life runs from up to 18 hours on SE 3 to up to 50 hours on Ultra 4 per charge, for the three models on the Apple Watch battery page at apple.com (read September 27, 2026):

Model	One charge	Low Power Mode	Workout tracking	Charge time
Series 12	Up to 24 hours	Up to 38 hours	Up to 10 hours	About 30 minutes to 80%, about 1 hour to 100%
SE 3	Up to 18 hours	Up to 32 hours	Up to 7 hours	About 45 minutes to 80%, about 75 minutes to 100%
Ultra 4	Up to 50 hours (over 2 days)	Up to 84 hours (over 3 days)	Up to 18 hours; up to 25 with Extended Workout, up to 45 with Max Extended Workout	About 45 minutes to 80%, about 75 minutes to 100%

Apple ran these tests itself in July and August 2026 (Series 12, Ultra 4) and July and August 2025 (SE 3), with a set mix of time checks, notifications, app use and workouts. It says battery life varies by use, configuration, cellular network, signal strength and many other factors. A 15-minute charge gives up to 12 additional hours on Series 12, up to 18 additional hours on Ultra 4 and up to 8 hours of battery life on SE 3.

Apple's compare page for Apple Watch lists a one-charge rating for older models:

Older model	One charge
Series 11	Up to 24 hours
Ultra 3	Up to 42 hours
Ultra 2 and the original Ultra	Up to 36 hours
Series 1 to 10, SE and SE 2	Up to 18 hours

How Many Years Does an Apple Watch Battery Last?

Apple doesn't give a lifespan in years for an Apple Watch battery. Its battery service page says the battery is designed to retain up to 80% of its original capacity at 1000 complete charge cycles. A charge cycle is 100% of the battery's capacity used in total, not necessarily from one charge: in Apple's example, 75% one day and 25% the next add up to one cycle. Apple ties lifespan to the battery's "chemical age", which is more than the passage of time and includes the number of charge cycles and how the battery was cared for.

As the battery chemically ages, the charge it can hold shrinks, so the watch needs charging sooner, and its "peak power" may drop. Apple Watch Series 5 and later, SE and later, and Ultra and later run an automatic system that manages performance to reduce those effects.

How to Check Your Apple Watch Battery Health

Your Apple Watch battery health appears as a Maximum Capacity percentage on the watch:

1. On your Apple Watch, open the Settings app.
2. Tap Battery, then Battery Health.
3. Scroll to Maximum Capacity, a measure of today's capacity against the battery when new.

A Battery Needs Service message on that screen is Apple's cue to contact Apple Support. A brand-new watch may read slightly under 100 percent, Apple notes, depending on the time between manufacture and activation.

What Apple Does to Slow Battery Ageing

Apple slows battery ageing with two charging features, and it gives two care tips for owners:

• Optimized Battery Charging (watchOS 7 and later): the watch learns your daily charging habits and cuts the time it spends fully charged, holding the battery between 75% and 80% in some situations. On Series 9 and later and any Ultra, it's always on.
• Optimized Charge Limit (watchOS 10 or later, on SE and later, Series 6 and later, and Ultra and later): the watch learns your daily usage and determines when to charge only to an optimized limit and when to allow a full charge. Apple warns that turning it off can increase wear on your battery and reduce its lifespan.
• Half charge for storage: keep Apple Watch half-charged when you store it for the long term.
• Heat: Apple Watch works best at 32° to 95° F (0° to 35° C) ambient temperatures, and temperatures above 95° F (35° C) can permanently damage battery capacity. Don't charge or leave the watch in hot places, including direct sun, for long periods.

When to Replace the Battery, and Your Options

Replace the battery when Battery Health shows Battery Needs Service, or when you think the battery needs replacement: in both cases Apple's route is to contact Apple Support. What you pay depends on coverage:

Option	When it applies	Apple's estimate (US)
Battery service, out of warranty	A worn battery	$99 for Series 4 and later, SE and Ultra; $79 for Series 3
Battery service with AppleCare	Capacity below 80%	$0
Apple Authorized Service Provider	Either case	The provider sets its own fee

Apple's estimates from support.apple.com/watch/repair, US, checked September 27, 2026. Prices change, and Apple inspects the watch to set the final fee. Apple's tool doesn't list Series 1, Series 2 or the first-generation Apple Watch.

Is Battery Wear Covered?

No, normal wear isn't covered by the standard warranty. Apple's one-year Limited Warranty is for manufacturing issues, and Apple's watch repair page rules out "batteries that wear down from normal use". An AppleCare plan changes that: Apple replaces a battery whose capacity has dropped below 80% for no extra charge. Check your coverage status on Apple's site, and read AppleCare+ for AirPods and Apple Watch for what the plan includes.