In a recent report by MacRumours, it has been suggested that the new Apple Watch Series 7 will have a longer battery life, and make this the major selling point over a new set of heath features.
According to a well-known Apple analyst Ming-Chi Kuo, the Series 7 will be getting a full redesign for the first time in years, with completely redesigned edges with a flat-edge design.
A new report from the Economic Daily News notes that the smaller "S7" chip will free up internal space for a larger capacity battery or additional health sensors. However, Apple is expected to delay the introduction of other sensors until 2022 at the earliest, according to multiple reports from sources with a high accuracy for predicting Apple's plans.
According to Bloomberg, Apple is working on a way to bring blood glucose monitoring capabilities to the Apple Watch using a non-invasive optical sensor, but it will not be ready for commercial launch for several more years. Apple was also considering adding a body temperature sensor in the 2021 Apple Watch, but Bloomberg says it is instead likely to be introduced in the 2022 update.
With the redesign expected to allow Apple to either retain the size of the current generation model or slightly thicken it – albeit not in a way noticeable to the user – this could leave ample room for Apple to increase the battery capacity inside.
The 44mm Apple Watch Series 6 uses a 1.17Wh battery that's 3.5% larger than the battery in the Series 5, while the 40mm Apple Watch Series 6 includes a 1.024Wh battery that's 8.5% larger than the battery in the Series 5. However, despite improvements in charging speed, the addition of new features and sensors in successive Apple Watch models has seen battery life stay relatively constant over the years.
One rationale for prioritizing increased battery life in the Series 7 is that Apple could heavily promote the improvement in order to lure owners of older Apple Watch models to upgrade. This could be particularly attractive to users whose Apple Watch battery life has gradually deteriorated over the years due to chemical aging.
Aside from potential battery improvements, Apple Watch Series 7 is also expected to feature improved wireless connectivity, an improved U1 Ultra Wideband chip, thinner display bezels, and the use of a new lamination technique that brings the display closer to the front cover, with updated screen technology.