Tech Expert Shares The ‘Worst Thing You Can Do’ For Your Smartphone’s Battery Life: ‘Don’t Make A Habit Of Doing It Every Single Day’

When Apple first came out with the iPhone, it also sold a 5-watt charging block that now seems very slow to some people. But there’s a reason why this speed is intended for the phone. The slower charger took more time to power up your device, but it did so without heating it up. Because extreme temperatures, including heat, are detrimental to your phone battery, you’ll want to avoid getting the battery too hot.

The 20-watt chargers that Apple currently sells charge your device far faster, but at a cost: they add more heat to your battery. If you’re “in a pinch” and need to charge your phone quickly, the 20-watt charger makes more sense to use. But for all other times, and especially when you’re charging your phone while you sleep, go for the slower charger. It will help ensure that your battery lasts longer.