Enlarge (credit: Fitbit) The Fitbit Charge fitness tracker is the company’s best-selling product line, and the latest model, the Charge 5, was just announced. Up for preorder now, the Charge 5 adds ECG (electrocardiogram), EDA (electrodermal activity) stress sensors, an AMOLED display, and a stainless steel facelift for $50 more than its predecessor, the Charge […]
