How to charge your smartphone, according to science


Charging your smartphone is easy, right? Just plug it in and let it charge.


And if you’ve been doing this for a while, it is probably the case that your smartphone battery isn’t what it once was.

It could be down to general wear and tear but it could also be because you have been charging your smartphone wrong and even causing it long term damage.

Like most people you probably plug in your dead smartphone and let it charge overnight. However, that could actually be doing more harm than good.

Unfortunately there is lots of advice, tips and theories both good and bad on what’s best when it comes to getting the most out of your smartphone battery.

First spotted by Business Insider, a new educational website called Battery University aims to debunk some of those myths by offering basic tips that will help you prolong the battery life on your smartphone or tablet.

Charge your smartphone a little at a time

According to Battery University you should avoid leaving your phone on charge all night and instead charge it a bit at a time throughout the day.

Partial charging is the best for the long term health of your battery, the site says.

Don’t let your smartphone battery drain completely

In the early days of smartphones we were often told that allowing the battery to drain completely and then letting it fully charge was the best thing to do. However, this should also be avoided, the experts claim.

However, allowing your smartphone to “deep-discharge” will cause more damage over time and will actually make them wear out more quickly.

Where possible, avoid letting your battery drop into the red warning stage.

Keep the battery level between 65% and 75%

While it may not be very practical, keeping your battery between 65% and 75% charge is the optimal level for lithium-ion smartphone batteries and will help it last longer over time, Battery University claims.

Never fully charge your smartphone

Apparently fully charging your smartphone can also do harm to the battery and should be avoided.

This is because lithium-ion batteries do “not need to be fully charged, nor is it desirable to do so.”

“In fact, it is better not to fully charge, because a high voltage stresses the battery,” Battery University says.


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