The capacity of the Apple Watch Series 4 with a size of 44 mm by 16.5% compared with the Apple Watch Series 3 version in 42 mm.
When Apple announced the release of the Apple Watch Series 4, she promised the same 18 hours of battery life on Watch Series 3. It turned out that this time provided by a smaller battery.
In other words, despite the larger display, the battery capacity has decreased on both devices Series 4.
Accurate data concerning battery capacity, the Apple Watch appeared on the official Apple website in the document called Apple Product Information Sheet in the section with a variety of legal information. Capacity shown there in absolute value, the watt-hours. For smart watches there are these values:
Apple Watch Series 3 (42 mm): 1,34-watt-hour
Apple Watch Series 4 (44 mm): 1,12 watt-hours
Apple Watch Series 3 (38 mm): 1.07 watt-hours
Apple Watch Series 4 (40 mm): 0,86 watt-hours
The capacity of the Apple Watch Series 4 with a size of 44 mm by 16.5% compared with the Apple Watch Series 3 version in 42 mm. New model of the Apple Watch size 40 mm differs from its predecessor, the Series 3 38 mm to 19.7%.
We can assume that Apple has done a lot of work watchOS 5, while the new chip S4 offers more options for energy efficiency.
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