When Apple announced the Apple Watch Series 8 on Wednesday, it introduced a new low power mode feature that lets the wearable double its battery life by turning off a few features. It won’t be limited to Apple’s latest devices, though — during the presentation, Apple said low power mode is coming to “the Series 4 and later” with watchOS 9, which is launching September 12th.
The company didn’t say whether the mode would be as effective on older devices as it claims it will be…
