Yesterday saw the partial announcement of the OnePlus Watch 2, which included a first glimpse and some important facts. We can now compare the OnePlus Watch 2’s battery size to those of rival devices thanks to an FCC listing that has made it clear.

Long battery life will be the OnePlus Watch 2’s primary selling point, as was disclosed yesterday. According to OnePlus, the gadget will last 100 hours on a single charge, which is far longer than the majority of popular smartwatches on the market right now. However, it turns out that it will not be able to accomplish it without a very large battery.

According to the FCC listing, the OnePlus Watch 2 features a 500 mAh battery. The wristwatch was recently released.

That makes it, for contrast, 64% larger than Google’s Pixel Watch 2 and nearly 20% larger than the 44mm Galaxy Watch 6. However, with 2022’s Galaxy Watch 5 Pro—which we lauded for its multi-day battery life—coming in at a higher 590 mAh, OnePlus is not exactly breaking ground.

OnePlus Watch 2

It’s also higher by a considerable margin compared to the original OnePlus Watch. A few key battery capacities follow:

  • Pixel Watch 2: 304 mAh
  • Galaxy Watch 6 (40mm): 300 mAh
  • Galaxy Watch 6 (44mm): 425 mAh
  • Galaxy Watch 5 Pro: 590 mAh
  • OnePlus Watch: 402 mAh

Although OnePlus’s boast of 100 hours of use from this 500 mAh battery seems absurd, it may not be when you consider the whole picture. Samsung stated that the Galaxy Watch 5 Pro may last up to 80 hours, while the larger Galaxy Watch 6 versions could last up to 40 hours. Although 100 hours is a significant amount, software could be able to extend this capability to meet that requirement.

Nevertheless, it is still unclear if OnePlus will employ Wear OS to reach this goal. While it appears that OnePlus is using a customized version of Wear OS, we are unsure if it is the basis for Samsung’s results.

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