Five symptoms and prevention / coping methods in the case of smartphone charging troubles.I can't charge it, the battery runs out soon ...-It is closer to IT.Soft Bank News

Don't you keep your smartphone charging just because you're at home on telework?In fact, it is one of the causes of shortening the life of a smartphone.In some cases, fire or smoke during charging ...

This time, we will tell you how to find the cause of the battery (lithium -ion battery) and charger problems installed in the smartphone, how to prevent / deal with a charger.I did it.

The National Life Center of the Consumer Affairs Agency, which aims to stabilize and improve national lives, has also called for the use of lithium -ion batteries and chargers used in smartphone batteries.

ソフトバンク株式会社 テクノロジーユニット デバイス&AI技術本部 品質管理保証部　朝枝 隆裕（あさえだ・たかひろ）

In charge of hardware quality control and management in product development centered on IoT devices, ensuring the right quality of PL and regulations, and safety and safety activities through industry collaboration.

You do not have this symptom?Main symptoms that you want to check ① to ③ (You cannot charge, the battery decreases quickly, your smartphone expands)

A lot of electronic precision equipment is packed inside the smartphone, and it is made as precise as the human body.If you continue to use a lot of charging and discharge, watch long -term video viewing or use apps in an environment that causes high temperatures, or give shocks such as falling, it will gradually deteriorate.

Charger / cable and smartphone specifications may not be suitable.In addition, one of the factors is the damage of the charging terminal (USB) of the smartphone and charger, and the disconnection of the charging cable.In addition, there are "USB PD (PowerDeliver)" and "Quick Charge" that enable high -speed charging, but if the charger or smartphone is not compatible, it cannot be used for high -speed charging.

Prevention method when charging cannot be charged

The charger body / cable and rating (output voltage / current) listed in the instruction manual have a smartphone rating (input voltage / current) and specifications.Let's use it after confirming the safety.

Check if the input / output value described on the charger or smartphone matches

It may be caused by aging of batteries, continuing to fully charged, etc. in a high temperature place.The material used in the electrodes will accelerate the deterioration due to the usage environment, operation load, and charging, etc., and the battery will decrease faster.

Prevention method when battery decreases quickly

"Let's keep the charging 100%(fully charged) state, or avoid leaving it in a 0%(battery empty) without using it for a long time. Also, how to use it.It depends on the situation, but if you use it correctly, it can be used in the same way as a new state if used correctly. "

A lithium -ion battery is a battery that uses a compound containing a metal called "lithium" in the electrode and discharges by the "lithium ion" movement.The detailed mechanism is explained in this article.

It is a state of abnormal appearance such as damage or deformation.When the deteriorated battery approaches the lifespan, gas may occur due to the oxidation of internal electrolytes and the battery pack may expand.If you continue to use it in that state, the battery pack will be damaged, causing fire and explosion due to internal shorts, gas and outside air.Also, be careful when the rear panel or windshield is pushing up due to the battery expansion.

How to prevent expansion