Modern-day smartphones are crammed with so many features that it's not uncommon for their batteries to exceed 4,000 or 5,000 mAh. While these large batteries can deliver day-long battery life, they ...

Fasten your seatbelt, and make sure your seat is upright, your tray table is stowed and your devices are in airplane mode. It’s one of the most familiar pre-flight instructions in modern air travel, ...