Garmin Instinct 2 Dual Power Tactical Edition Black Used only twice since purchase and stored at home. The battery was stored empty for about 2 years, so I don't know the extent of the battery degradation. I tried charging it to 100% and leaving it connected to a smartphone for two weeks, and the battery level was 59%, so I don't think it has degraded that much. No missing items, and solar charging works without any problems. Garmin GARMIN Instinct 2 Dual Power Instinct 2 Dual Power Tactical Edition Tactical Edition GPS Smartwatch Outdoor Watch The "Instinct 2" series maintains its robustness and high-precision navigation functions, while the display's high resolution is about 89% higher than the previous series, making it clearer. The powerful battery has also evolved, and the "Instinct 2 Dual Power" achieves unlimited battery life in smartwatch mode. Solar powered model Size: 45x45x14.5mm Weight: 52g Display size: 23 x 23mm Resolution: 176x176 pix Operating time Smartwatch mode: Up to 28 days + unlimited GPS mode + optical heart rate mode: Up to 30 hours + 18 hours TACTICAL limited features MGRS display: High-precision grid code "MGRS" used by NATO, displayed simultaneously with latitude and longitude for accurate location awareness. Stealth mode: Turns off GPS location acquisition and storage, and disables wireless communication to prevent information leakage during missions. Night vision mode: When night vision is turned on, the backlight is reduced for clear visibility on the screen even with night vision goggles. Jumpmaster: Calculates altitude according to military guidelines and automatically detects jumps to navigate the descent route to the destination. Kill switch: When captured by enemy forces, all data in the watch is erased and reset. Activated by simultaneously pressing and holding "CTRL+GPS+SET". * Can be canceled by pressing a button within 10 seconds of activation.