Fast charging will damage the battery

Does fast charging damage your cell phone battery?

"Does fast charging harm a cell phone battery?"

I recently discussed this question with two friends over an after-work beer.

Both had bought a new cell phone around the same time last year. One of them then complained that he had to constantly recharge the battery. The other had no problems with the battery.

It turned out that the buddy with the battery problems charges his cell phone with a power adapter that he bought as an accessory and charges the cell phone particularly quickly. The other buddy, on the other hand, charged his cell phone very comfortably and slowly with the original power pack.

Could the difference be because of that?

If you want, just tell you the whole story in a short video. Otherwise, just read below 😉

What fast charging does with your battery

I think fast charging is actually pretty practical with cell phones. In the morning, just plug your smartphone into the socket, charge it to almost full capacity in half an hour and off you go.

However, the lithium-ion or lithium-polymer batteries built into cell phones are quite sensitive (if you want to know the difference between lithium-ions and lithium-polymer: just take a quick look at this blog post).

The high charging current during fast charging stresses the battery. I like to compare that to a visit to the bar: every now and then a shot is okay, the bottle is more likely not to tip ex. The aftereffects are similar with drinking and fast loading. In both cases, the performance will decrease after the pressure refueling - at least if something like this happens more often 😉

Another aspect that is added is the warmth. You may also have noticed that your phone gets warm while charging. Fast charging generates more heat than charging your battery with a weaker power supply.

The problem: from 30 degrees it starts to get uncomfortable for your battery. The frequent warming during fast charging also damage the battery in your mobile phone.

Battery care tips

If you don't treat your battery well and keep stressing it, its capacity will deteriorate faster and you will have to charge more and more frequently.

So that it doesn't get that far, I have put together a few simple tips with which you can keep your battery efficient for a long time.

1. Load in flat cycles

Charge your cell phone so that the battery level always remains between 30% and 80%. These flat cycles save your battery.

Don't worry: it doesn't matter how often you plug in your phone to charge the number of charging cycles.

A charge cycle is a full charge from 0 to 100%. However, this charge does not have to pass in one piece.

So you can fully charge the battery once and then use it until the mobile phone runs out or only charge it twice to 80% and then plug it in again at 30%. Both are charging cycles. However, the flat cycle saves the battery.

2. Leave your phone alone while charging

Maybe you couldn't wait until there was a little charge in your cell phone and used it while it was charging.

It can get pretty warm under certain circumstances, right? Exactly this warmth is not good for your battery at all.

So avoid using your phone while it is charging. The worst are of course games and everything else that demands the processor. With Pokemon Go, the cell phone gets pretty hot even without charging ...

3. Avoid wireless charging

Nowadays, many cell phones can also be charged wirelessly via induction. That's pretty cool, of course, and practical too. But when I take my cell phone out of the inductive charging cradle in my car, it is always quite warm. The ideal pocket warmer in winter, but of course that can't be good for the battery.

With inductive charging, the heat is generated both at the transmitter (i.e. the charging cradle or mat) and at the receiver (i.e. in the mobile phone). Since the cell phone lies directly on the surface of the charger, the heat generated is difficult to dissipate and accumulates, which is why the cell phone then becomes really warm.

If you want to read more about the technical background of wireless charging, I recommend this article from Design & Elektronik.

4. Keep cool in summer

Heat damages your battery. It got there so slowly, right? 😉

So, especially in summer, you should make sure that your battery does not get too warm.

For example, when the charge level is high, you should never leave your cell phone in a car parked in the blazing sun. In the car it can easily get over 50 or even over 60 degrees, which can irreversibly damage your battery.

4. Store properly

If you do not want to use your cell phone or other device for a while, you should store it in a way that conserves the battery. So the battery is still fit when you need the device again or want to resell it.

Before you pack the device away, charge the battery again up to 50–70% and then store the device at room temperature.

Since lithium-ion batteries slowly discharge themselves, you should occasionally dig out the stored devices, switch them on and, if necessary, recharge them to the optimum battery level.

Always the latest battery knowledge

If you want to be the first to know when there's a new blog post or video from me, just subscribe to my newsletter. For me this is the best way to keep in touch with you. I'm happy for you! 🙂

Battery careLithium ions