Apple Watch Series 4 fall detection feature is off by default unless you are 65 or older.
The built-in optical hearts sensor has been a feature of the Apple Watch since day one, but has gains more capabilities with each new release. The ad features a man and several doppelgangers taking part in sports activities while wearing an Apple Watch Series 4. Redditor No1ARSoul, however, noted that you'll only find that out if you read the online manual for Fall Detection and how it's enabled by default for anyone whose age is 65 or older in their Apple accounts. For other users, the feature needs to be turned on manually by going into the Emergency SOS settings under the My Watch Tab menu. However, if no movement is detected for a minute, the Watch will start a 15 second countdown, further tapping and sounding a louder alarm.
Initial glance upon internals provides more or less the same look as previous iterations of the smartwatch with the battery and the Taptic Engine covering most of the place. How you fall (soft versus hard) is important and, as mentioned, it may trigger false alarms.
But the company's Apple Watch Series 4 is a major update compared to Series 3, and it's all the more apparent when you tear it down to bits. But on harder surfaces it worked fine. It will prove useful to people anxious about their heart health.
iFixit says Apple clearly put a lot of thought into redesigning the watch both inside and out. The tiny battery has 1.12 WHr of capacity, giving it about 4 percent greater capacity than the Series 3 (1.07 WHr). The battery life remains similar to last year's model.
It would be interesting to know whether reviewers realized fall detection was disabled before testing it with Series 4.
The repositioned speakers let Apple remove one of the case openings from the Series 3 model.