How To Make Apple Watch Series 4 Battery Last Longer. Modern batteries by the way cannot be fully charged or entirely discharged. Apple Watch batteries use lithium-ion technology.

I have an apple watch series 4 and the battery can only last for about 6 hours after a full charge. For the Series 5 Series 4 and Series 3 Apple estimates that it takes two hours for Apple Watch to charge with 80 being reached after 90 minutes on. To reassemble your Apple Watch Series 4 follow these instructions in reverse order to reattach the battery.
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In other words most people will be ready to upgrade. I have a Apple Watch series 4 in which the battery lasts only for 5-6 hours after a full charge and there are no any active apps that are draining the watchs battery. So you just got a new Apple Watch and your battery seems to drain too fast. Modern batteries by the way cannot be fully charged or entirely discharged.

