Apple Watch SE 3 | Setup & Features | Complete Guide

Thinking about the Apple Watch SE 3 and want the real-world basics before you buy? In this complete guide on Gadgeto Lab, I’ll walk you through what’s new, what matters day-to-day, and the best settings to get the most from watchOS 26—whether you’re upgrading from an older Apple Watch or buying your first one.

Main features & specifications:
• Case sizes: 40mm or 44mm (lightweight aluminium build)
• Always-On Retina display (OLED LTPO), up to 1,000 nits peak brightness
• Tough Ion-X front glass with improved crack resistance
• S10 chip (64-bit dual-core) with 4-core Neural Engine + 64GB storage
• Health sensors: optical heart sensor + temperature sensor
• Sleep features: sleep stages + sleep score + sleep apnoea notifications (supported regions may vary)
• Safety: Emergency SOS, Crash Detection, Fall Detection, international emergency calling
• Water resistance: 50m (swim-proof)
• Connectivity: Wi-Fi, Bluetooth 5.3, L1 GPS; optional cellular with 4G LTE + 5G support
• Battery: up to 18 hours typical use; up to 32 hours in Low Power Mode
• Fast charging: up to ~80% in about 45 minutes; ~15 minutes can deliver up to 8 hours of normal use (usage varies)
• Compatibility: iPhone 11 or later with iOS 26 or later

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Apple Watch SE 3 | Setup & Features | Complete Guide
Apple Watch SE 3 | Complete Guide
How to Use Apple Watch SE 3