Why You Really Should Stop Charging Your Phone Overnight

What’s the best way to charge an iPhone to get the longest possible battery life? I asked myself this question and decided to do some experiments to find out.

Before falling asleep, I did what millions of other people do: I put my iPhone on charge overnight.

But why are we doing this?

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An iPhone can go from zero to 50% charge in about 30 minutes with a 20W charger, then fully recharge in less than two hours.

Since an iPhone can charge so quickly, it doesn’t make sense to hook it up to a charger for eight hours a day. This is equivalent to one third of its lifespan.

Now Apple has integrated Optimized Battery Charging into iOS, which stops the iPhone from charging once the battery reaches 80% and only adds the remaining 20% ​​in time for you to wake up in the morning. But that still means the iPhone is connected to power all night.

And it still charges, albeit at a slower rate. This is how it stays at 80%.

So why is it bad to leave it connected to a charger for long periods of time?


It’s a stack killer. While there’s nothing you can do about the normal wear and tear on a battery during charging and discharging, heat is something you can do something about. When your iPhone is connected to a charger, it gets hot – hotter than if it’s not connected, and while this increase may only be a few degrees above ambient temperature, doing so during the night, every night, does not seem smart tome.

So I drastically changed the way I charge my iPhone.

Rather than charging it at night, I give it a charge or two during the day. Here is the charging schedule that works for me:

  • I put it on for 30-45 minutes in the morning after getting up (I also charge my Apple Watch at the same time).
  • Then I charge it around mid-afternoon for about another 30 minutes to bring it up to that 80% mark, which will usually be enough to keep me going until the next morning.

Note that if I’m going to be spending a lot of time in the car or on the go, I’ll also use a car charger or take a power bank with me.

This system works well and I think it puts less strain on the iPhone’s battery (time will tell) as well as the charger. It also allows me to plan where I need my chargers, so I don’t just rely on a bedside charger.

And when I’m at home, working on the road, or traveling, this charging regimen hasn’t let me down.

Because people always ask, I always charge with cable rather than wireless, and I use a 20W Anker Nano USB-C Charger. For portable power banks I use the size of a candy bar Anker 511 5000mAh Power Bank and the biggest 10,000mAh Anker PowerCore 10000 Redux. Both are portable, sturdy, reliable and fantastic power banks. Don’t forget to bring a charging cable!

As for charging in the car, nothing beats the Ultra-fast and super-powerful 130W LinkOn USB-C chargerfeaturing 100W and 30W USB-C ports.

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