Why it’s not a good idea to charge your phone overnight

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  • Post last modified:August 1, 2023
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You are currently viewing Why it’s not a good idea to charge your phone overnight

Even though it may seem like the best time to charge your phone is at night, experts say you should do the opposite.
Day or night, you can charge your phone.

Android makers, like Huawei, say that charging your phone during the day instead of at night may help the battery last longer in the long run. In the manual for their Android phone, it says, “Do not leave your phone connected to the charger for long periods of time or overnight.”

On the other hand, they say that battery optimisation happens between 30 and 70 percent of the time. This means that for the best battery life, you shouldn’t let your battery charge past 70% or run down below 30%. Since your phone isn’t reaching 100%, you may have to charge it more often, but in the long run, the battery should last longer. In the same way, Apple’s energy optimisation setting happens when the battery is less than 80% charged. Smartphones are powered by lithium-ion batteries, which will always lose power over time. Even though the exact time of day doesn’t matter, charging at night will probably take longer.

Power from lithium-ion batteries

Even though the scientific method is complicated, there is a simpler way to explain it. The battery works by “shifting charge carriers between electrodes,” which puts stress on the electrodes and wears them out over time.

iFix Kevin Purdy gives an easy-to-understand example of a sponge to explain this further. “It’s not hard to turn a dry sponge into one that is mostly wet,” he said. “But trying to get the last drops of liquid out of a sponge that is almost full takes a lot of force, and it’s likely that more liquid will pool on the top. That ‘pooling’ is the building of the S.E.I. (solid electrolytic interface) on a battery. S.E.I. growth makes a battery less powerful overall.”

Also, letting the battery run down to 0% will reduce stress on the wires. This may feel wrong, but it will help your phone’s battery last longer in the long run.

First, Safety

Experts also say that you shouldn’t charge your phone at night because it could be dangerous. You may have noticed that while you were charging your phone, it got warmer. This could cause a fire if the phone gets too hot while you’re sleeping and you don’t know what’s going on. Paul Shaw of Staffordshire Fire Rescue told The Guardian that charging your phone under a pillow or on your bed is called “thermal runaway in the battery.” It heats itself. It just keeps going. Because the battery won’t put out enough heat, you can use a work area or a wooden side table.

Read: While talking on the phone in the bath, an Italian teen died from electricity.

In conclusion

There are things you can do to help your battery last longer. Even though it doesn’t matter when you charge your phone, you shouldn’t leave it plugged in for a long time after it’s fully charged. You can also use your phone’s tools to make the best use of its battery. Optimised Battery Charging can be turned on on iPhones with iOS 13 or later. Once you turn it on, your iPhone looks at how you charge it and waits for it to finish charging after 80%.

Find other ways to improve.

How long your battery lasts between charges is just as important as how long it lasts generally. No one likes it when their phone dies when they need it the most. Here are some tips from Samsung on how to make your everyday battery last longer:

There are apps that you can download that keep an eye on background programmes and close them when they’re not being used.

  • Turn down the brightness of the screen or turn off auto-brightness.
  • Don’t use images that move.
  • Set the screen to go blank more quickly.
  • When you’re not using Wi-Fi or Bluetooth, disconnect from them.
  • Get rid of Widgets.

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