Samsung Galaxy Watch 4 leak suggests battery life won’t be better than Watch 3

Samsung Galaxy Watch 3
The Samsung Galaxy Watch 3 (Image credit: Srivatsa Ramesh)

One of the things we were hoping for from the Samsung Galaxy Watch 4 was better battery life, but it looks like we probably won’t get this, as a leak suggests there’s no change to the battery size.

This comes from SGS Fimko (a Finnish certification agency) in a listing spotted by 91mobiles, which includes Samsung smartwatch model numbers SM-R865F and SM-R860 – both of which have previously been linked to the Samsung Galaxy Watch 4.

According to the listing, the wearable has a 247mAh battery, which is exactly the same capacity as the 41mm Samsung Galaxy Watch 3. That suggests that we’re looking at the smaller model here, which could be 41mm again or 42mm. It also suggests that the larger model (probably either 45mm or 46mm) will have a 340mAh battery like the 45mm Galaxy Watch 3.

Battery life could be better or worse

So battery life may not be any better on these new models. In fact, it might even be slightly worse, given that rumors suggest the wearables will have marginally larger cases, and therefore probably larger screens.

There is some hope though, as they might also have a powerful and efficient new chipset, which could reduce the battery drain. It’s also likely that the Samsung Galaxy Watch 4 will run an overhauled version of Wear OS rather than Tizen, which is sure to affect battery life for better or worse.

Aside from the battery size, this certification listing also mentions 5W charging, which might sound slow, but considering how small smartwatch batteries are it should be enough to charge them reasonably quickly.

While we’d take these details with a pinch of salt, certifications tend to be accurate, and right now there are no conflicting rumors. We’ll find out for sure how big the Samsung Galaxy Watch 4’s battery is – and how long-lasting the watch is – when the wearable launches, which it might do before the end of June.

TOPICS

James is a freelance phones, tablets and wearables writer and sub-editor at TechRadar. He has a love for everything ‘smart’, from watches to lights, and can often be found arguing with AI assistants or drowning in the latest apps. James also contributes to 3G.co.uk, 4G.co.uk and 5G.co.uk and has written for T3, Digital Camera World, Clarity Media and others, with work on the web, in print and on TV.

Read more
Samsung Galaxy Watch Ultra
Samsung's game-changing wearable battery-life upgrade could arrive next year, and even the Apple Watch could benefit
Samsung Galaxy Watch 7 front
Samsung Galaxy Watch 8: latest rumors, updates, and what we want to see
OnePlus Watch 3 on wrist with rotating digital crown
Exclusive: OnePlus Watch 3 revealed, with an Apple Watch-style rotating digital crown and Galaxy Watch-beating battery life
Samsung Galaxy S24 Ultra
This Samsung Galaxy S26 rumor might make you rethink buying a Galaxy S25
Samsung Galaxy Z Flip 6 in blue
The Samsung Galaxy Z Flip 7 might improve on its predecessor in one crucial way
Samsung Galaxy Z Fold 6 in Paris in front of the Louvre pyramid
The Samsung Galaxy Z Fold 7 and Z Flip 7 could have better battery life – but not for the reason you might expect
Latest in Smartwatches
Apple Watch Ultra 2 timer
The Apple Watch is getting a sleep alarm upgrade it probably should have had 10 years ago
Google Pixel Watch 3
Google Pixel Watches hit with delayed notifications, crashing, and performance issues following Wear OS 5.1 update
Apple Watch Ultra 2 move data
Apple is reportedly planning a huge future Apple Watch upgrade to turn it into an AI device with onboard cameras
Apple watch pair with iphone
The Apple Watch SE 3 is apparently in 'serious jeopardy', and the news isn't much better for the Ultra 3 or Series 11
Oppo Watch Mini X2 teaser
Oppo Watch X2 Mini teaser could be our first glimpse of the smaller OnePlus Watch 3
Google Pixel Watch 3
Google Pixel Watch 3's Loss of Pulse Detection could save your life – here's how the company created it
Latest in News
An Apple Music pink/pixellated poster advertising DJ with Apple Music
DJ with Apple Music lands, allowing subscribers to build and mix DJ sets directly from its +100 million-song catalog
The Meta Quest 3 and controllers on their charging station which is itself on a wooden desk next to a lamp
Forget Android XR, I've got my eyes on Vivo's new Meta Quest 3 competitor as it could be the most important VR headset of 2025
Samsung Galaxy S25 from the front
The Now Bar on Samsung One UI 7 is about to get a lot more useful – and could soon match Live Activities on iOS
Marvel Rivals
Marvel Rivals will get two new hero skins for Moon Knight and Black Panther this week meaning I'll now need to farm even more Units
An iPhone running iOS 18 on a purple and blue background
iOS 18.4 could launch soon with a major upgrade to your iPhone’s notifications
Netflix Ads
Netflix adds HDR10+ support – great news for Samsung TV owners, but don't expect LG and Sony to do the same any time soon