Samsung Galaxy Watch 5 Review: The Best Android Watch, for Now - CNET
Samsung R820 Galaxy Watch Active 2 Stainless Steel (44mm) gold with 1.4 inches size with Resolution 360 x 360 pixels with internal memory 4GB with 1.5GB RAM with a Non-removable Li-Ion 340 mAh battery
Amazon.com: SAMSUNG Galaxy Watch Active2 - IP68 Water Resistant, Aluminum Bezel, GPS, Heart Rate, Fitness Bluetooth Smartwatch - International Version (R830-40mm, Aqua Black) : Electronics
Galaxy Watch 4 battery life reportedly hits 7 days - 9to5Google
Samsung Galaxy Watch 4 R860 40mm Bluetooth/Wifi/GPS Aluminum Case w/ Sports Band | eBay
Samsung Galaxy Watch 4 review | Tom's Guide
Galaxy Watch 4 battery may be tweaked in the same body - 9to5Google