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-[* black] The batteries are hidden under the motherboards which are held in their places by plastic frames.
-[* black] Without any heat, both batteries can be lifted out without any problems—as long as you have our spudger ready to hand.
+[* black] The watch engines are hidden under the motherboards within the plastic midframe:
+ [* black] We're glad to [link|https://youtu.be/1e4fYb-zwdE?t=278%7Cnew_window=true|tell Houston] that both of them can be removed ''without'' any problems — as long you have a [product|IF145-002-4|spudger] at hand.
[* black] The Watch4 Classic 46 mm accommodates a 1.35 Wh (361mAh @ 4.47 V) and its little 40 mm sister the Watch4 a 0.93 (247 mAh @ 4.47 V) battery.
- [* icon_note] Compared to the Watch3 with 1.3 Wh (340 mAh @ 3.85 V), this doesn't mean a big increase in performance. The Xiaomi Mi Watch from 2021 provides more power with 1.62 Wh.
-[* black] The plastic midframe holds, next to the battery, a rubber-ensconced alti-barometric sensor, the vibration motor, the hall effect sensors and a cable combo with a mircophone and switches.
+ [* icon_note] Compared to the Watch3 with 1.3 Wh (340 mAh @ 3.85 V), this doesn't mean a big increase in performance. With 1.6 Wh the [guide|141415|2021 Mi Watch] still packs a little bit more power and the [guide|136694|Apple Watch Series 6] twiddles its thumbs at the bottom line with 1.17 Wh.
+[* black] After shaking the last components out of the midframe we find the tiny vibration motor next to a likely to be alti-barometric sensor which looks exactly the same like the one in the [guide|135891|Watch3].
+[* black] Most interesting part is the button flex cable. It seems like there is a microphone on top an it is equipped with two connectors instead of the single one we have seen in the predecessor model.
+ [* icon_note] We assume this is because of the Samsung BioActive Sensor which is able to measure your body fat percentage, skeletal muscle and body water. To do so, you need to close a circuit with the watch by placing a finger on each of the buttons.