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| [* black] All together, this back cover is home to a tiny speaker and linear actuator, a microphone, a barometric sensor, and the heart rate and SpO2 sensors. Most of those parts live on the same flex cable octopus which is not removable. | |
| - | [* black] The replaceable part in the bunch |
| + | [* black] The only replaceable part in the bunch is the loudspeaker—if you trust the reading on the other side of the "not removable" battery. Which... we don't. It seemed perfectly removable to us! |
| [* black] The power cell delivers 1.59 Wh (410 mAh @ 3.87 V). That output puts it above the [guide|135891|Galaxy Watch3|stepid=270168|new_window=true] (1.3 Wh) and the Apple Watch [guide|136694|Series 6|stepid=271741|new_window=true] (44 mm) with 1.17 Wh. Only the [guide|141415|Xiaomi Mi Watch from 2021|stepid=283236|new_window=true] provides more juice with 1.62 Wh. | |
| [* icon_note] ''What’s that, a [link|https://www.tuvsud.com/en/industries/mobility-and-automotive/automotive-and-oem/automotive-testing-solutions/battery-testing%7Cnot uncommon|TÜV sign on a battery|new_window=true]? Haven’t seen this before in a smartwatch. But it’s not uncommon to see [link|https://www.tuvsud.com/en/industries/consumer-products-and-retail/wearable-devices|certification from TÜV for mobile electronics|new_window=true]. |