The cell phone battery drains faster in the cold – that is the reason

Only 50 percent charged and suddenly almost empty – winter is a problem for the smartphone battery. This discharges faster in freezing temperatures, but why?

You are on the go, take your smartphone out of your pocket and notice that your mobile phone has stopped working. Probably the fault is the battery that discharged outside in the cold. But why does this actually happen at low temperatures?

If it is too cold, some smartphones even switch themselves off – even if the battery is not empty. Especially temperatures below 0 degrees are a real battery killer. The reason for this lies in the substance that ion lithium batteries are made of. Lithium is one of the light metals. The electrically charged particles, the ions, move in the battery between the anode and cathode in a liquid made of electrolyte.

Particles can no longer move

The outside temperature of the battery has a decisive influence on the electrolyte fluid. If this is too cold or too hot, the electrochemical process in the battery is significantly slowed down because the liquid becomes more viscous. The consequence of this is that the lithium ions move much more slowly between the cathode and anode. This increases the internal resistance. If the smartphone then requires a lot of energy from the battery, the voltage drops – and this can lead to deep discharge. In the worst case, this can permanently damage the battery, so many cell phones switch themselves off for their own protection.

The winter cold puts the smartphone battery down

Not too cold – but not too hot either

The ideal outside temperature depends on the manufacturer. Apple specifies an optimal temperature of 0 to 35 degrees for iPhone batteries. In general, the battery should come into contact with temperatures of 0 degrees or colder as little as possible. If you are already looking forward to the warm temperatures in summer, you can unfortunately also be disappointed by your smartphone battery: At temperatures above 40 degrees, the processes inside the battery are accelerated, the battery “ages” much faster.

Also interesting: 7 tricks to make your old iPhone faster again

Do not expose the smartphone to the cold

If the outside temperature is below zero, you should increase the outside temperature of your smartphone. It is therefore best to carry your cell phone close to your body to keep it warm . A rubber cover can also protect the smartphone from the cold. If you want to recharge the battery, you should wait until the cell phone has reached room temperature again. In this way, the smartphone battery is optimally charged.

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