I have had this watch for less than a year. It's just ended up sitting on a shelf charging. I have an extra (still in box) charger which can come in handy when you travel. Let me know if you have any questions. Model:MTV62LL/A Case Size 40mm, 44mm Display Area 759 sq mm or 977 sq mm display area Case Thickness 10.7mm Processor 64-bit dual-core S4 processor; Up to 2x faster than S3 processor Electrical Heart Sensor Electrical heart sensor (ECG app); ECG app coming later this year Optical Heart Sensor Second-generation optical heart sensor Fall Detection Digital Crown Digital Crown with haptic feedback Features GLONASS, Galileo, and QZSS, Barometric altimeter, Optical heart sensor, Electrical heart sensor, Improved accelerometer up to 32 g‑forces, Improved gyroscope, Ambient light sensor, LTPO OLED Retina display with Force Touch (1000 nits), Digital Crown with haptic feedback, Louder speaker, Ion-X strengthened glass, Sapphire crystal and ceramic back Whats in the box Case, Band, 1m Magnetic Charging Cable, 5W USB Power Adapter Connectivity LTE and UMTS,Wi-Fi 802.11b/g/n 2.4GHz, Bluetooth 5.0 Power Up to 18 hours of battery life Width 38mm Depth 10.7mm Case Weight 36.7g