Siegler’s right. I wouldn’t give up the Series 5’s always-on display, but it comes at a high price: significantly worse battery life than its predecessors. I didn’t buy the original (“Series 0”) Apple Watch, but I’ve owned the Series 1, 3, 4 and 5. The S5 is easily the poorest battery performer of that bunch.
Case in point: it’s currently 8 PM, and my Series 5 Watch has fallen “into the red”—18% charge left. Now, to be fair, I haven’t charged the Watch since last night (I wear it as a sleep tracker). And, thanks to the time change here in the U.S., this day has been an hour longer than normal. But I’m still disappointed to be skating so close to “power reserve mode” each evening.
For now, the Series 5’s battery life is… adequate. But I’m not sure that will be true two or three years from now, after a thousand charge cycles. Those are big charge cycles, too; fully depleting the battery day after day will take a toll on battery health.
How much better does Apple Watch battery life need to be? With the Series 3, I could expect 50–60% battery life at the end of an average day. That seems just about right—that extra juice helped the device last through more demanding days. It also left some headroom for the inevitable battery degradation endemic to lithium-ion technology.
Let’s hope that Apple can clear that bar again someday, with some future Watch hardware iteration.