Which charger for Galaxy Watch8 and Watch8 Classic - EP-OL300 and what fits

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Which charger for Galaxy Watch8 and Watch8 Classic? Quick answer

For the Galaxy Watch8 and Watch8 Classic, the original Samsung EP-OL300 charger or a third-party replacement that explicitly lists this model in its specifications works best. For the watch to charge efficiently, you need a Power Delivery-compatible wall adapter that provides at least 5 V and 2 A.

Both the base Watch8 and the Classic variant use the exact same magnetic charger. If you have a power adapter from a newer Galaxy phone at home, you can easily use it to power the magnetic puck.

Fun fact: The EP-OL300 charger included in the box with the Galaxy Watch8 is the exact same accessory model that Samsung includes with the newer Galaxy Watch9.

What is in the box and how fast the watch charges

In the factory box of the Galaxy Watch8 and Watch8 Classic, you will only find the Fast Wireless Charger magnetic puck with a USB-C connector. The set does not include a traditional wall plug, so you must purchase it separately or use a phone charger.

According to certification data, wireless charging reaches up to 10 W, which is exactly the same as in the older Watch7 generation. Depending on the chosen case size, the watch has a built-in battery with a capacity of 325 mAh in the 40 mm version or 435 mAh in the 44 mm variant.

Battery life on a single charge varies depending on how the device is used. In testing by GSMArena, the Watch8 Classic model lasted about 60 hours with Always On Display turned off and about 36 hours when the AOD feature was enabled. In contrast, the Outlook Business editorial team noted that during their heavy use, the watch needed to be charged twice a day.

In everyday use, replenishing power is smooth, as shown by measurements by NordiskBil on the Watch8 Classic using the in-box factory charger. Recharging from 35% to 80-90% takes about an hour. A full battery charge takes less than 1 hour and 45 minutes.

Charger compatibility and pitfalls when choosing replacements

If you have older Samsung accessories in a drawer, the manufacturer's official compatibility chart from August 2026 brings good news. Your Watch8 charges at normal speed on the EP-OL300, the EP-OR900 known from the Watch5 and Watch6 boxes, as well as on the faster EP-OL715 model from the Galaxy Watch Ultra2 set.

Connecting the watch to the more powerful EP-OL715 charger will not speed up the process, as the Watch8 draws power at its standard rate. The older EP-OR825 charger included with Galaxy Watch4 watches will also charge the Watch8, but it will do so more slowly, at reduced speed.

When looking for a third-party replacement, you need to remain vigilant while reading the specifications. Many accessory manufacturers, such as MoKo, Autallgee, SwanScout, and JoyGeek, explicitly state in their descriptions that their products fit the Watch8 and Watch8 Classic, but no longer support the Watch9 or Ultra2 watches. Always check if the magnetic puck or docking station you are buying lists your specific model on its compatibility list.

We have selected the original, third-party replacements that explicitly list the Watch8, and a power adapter from the list recommended by Samsung.

Recommended chargers for Galaxy Watch8 and Watch8 Classic

Charging on the go and useful tips

If you are planning a trip, there is one thing you need to keep in mind. The Galaxy Watch8 and Watch8 Classic watches do not support the Wireless PowerShare reverse charging feature from a Samsung phone.

Fun fact: Wireless reverse charging via Wireless PowerShare directly from the back of a smartphone worked on Watch4, Watch5, and Watch6 models, but Samsung completely removed this feature starting with the Watch7 series.

When traveling, it is worth bringing the dedicated charging puck connected to a wall charger or a powerful power bank with a USB-C port. Samsung Canada notes that the power adapter for the charger should supply at least 5 V and 2 A, with original or certified compatible accessories delivering the best results. Among the recommended power adapters, the manufacturer lists models such as the Samsung 25W EP-T2510, which can easily power the magnetic cradle.

Sometimes the watch stops charging or charges slower than it should. In such cases, Samsung recommends removing thick protective cases from the watch body and detaching metal straps. Thick cases and metal components can interfere with charging.

Questions and answers about charging the Galaxy Watch8

Is there a charger in the Galaxy Watch8 box?

In the box with the watch, you will find a Fast Wireless Charger with a USB-C connector. The manufacturer does not include a wall power adapter. You need to purchase a power brick separately or use a power adapter you already have at home.

Does the original Galaxy Watch8 charger fit the Watch8 Classic?

Yes, both models use the exact same power standard and the same EP-OL300 charger. You do not need to look for a separate cable for the Classic version, as the included magnetic puck fits both watch variants.

Can the Galaxy Watch8 be charged from a Samsung phone?

No, the Galaxy Watch8 does not support Wireless PowerShare reverse charging from a smartphone's back. This feature only worked on watches up to and including the Watch6 generation. Samsung discontinued this solution starting with the Watch7 series.

Which power adapter for the Galaxy Watch8 charger, how many watts?

The wall adapter should provide at least 5 V and 2 A, preferably with Power Delivery support. The watch itself draws up to 10 W of power during wireless charging. A good choice, for example, is the manufacturer-recommended Samsung 25W EP-T2510 wall charger.

Will a wireless phone charger charge the Galaxy Watch8?

Samsung states that you can also charge the watch on a compatible Samsung wireless charger, such as the Super Fast Wireless Charger Duo, which has a dedicated spot for the watch. Charging speed then depends on the charger and the watch model, with the in-box charger providing the best results. Also remember Samsung's recommendations to remove thick cases and metal straps before charging, as they can interfere with contact with the charger.

Sources

• Samsung: Galaxy Watch Charger Speed & Compatibility Guide - manufacturer page (images.samsung.com)
• Samsung: Galaxy Watch8 and Watch8 Classic - manufacturer page (samsung.com)
• Samsung: Find the right charger for your Galaxy Watch - manufacturer page (samsung.com)
• GSMArena: Galaxy Watch8 and Watch8 Classic review, battery life - industry article (gsmarena.com)
• GSMArena: Galaxy Watch8 and Watch8 Classic charging speed outed - industry article (m.gsmarena.com)
• Outlook Business: Galaxy Watch 8 review - industry article (outlookbusiness.com)
• NordiskBil: Samsung Galaxy Watch 8 Classic review - industry article (nordiskbil.com)