Is Leaving My iPhone Charging Overnight Bad?

Nolan Levesque writes:

Hey, Chris. I’m wondering if plugging my iPhone in to charge before bed and leaving it plugged in for 8-10 hours after it’s fully charged is harmful? Thanks for all the great content; don’t let haters get you down!

Is Leaving My iPhone Charging Overnight Bad?

Is leaving my iPhone charging overnight bad?

Leaving your iPhone on charge while you’re asleep shouldn’t have any detrimental effects on the battery. The lithium-ion battery in your iPhone has two modes:

  • The fast charge, which can charge the battery to 80% of its capacity in around two hours.
  • The trickle charge, which will charge the battery to 100% of its capacity over three to four hours.

According to Apple, your battery will lose some of its capacity every cycle, but it will take thousands of cycles before your battery will only hold 80% of its charge.

The modern lithium-ion battery can take thousands of charge and discharge cycles before showing any kind of sign of not being able to hold a full charge. So I think that it’s safe to say that leaving your iPhone charging overnight wouldn’t be bad for it. If you’d like to know more, we’ve covered this topic in greater detail here: Should You Leave Your Smartphone Charging Overnight?

Image: New Battery by DougWard via Flickr

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Chris has consistently expressed his convictions and visions outright, supplying practical information to targeted audiences: media agencies, business owners, technology consumers, software and hardware professionals, et al. He remains a passionate personality in the tech community-at-large. He's a geek.