Replenishing charging is no problem Surprisingly new battery common sense Special feature Clever use of batteries (1)

Digital Life

Many people carry smartphones (smartphones) every day. If you are a business person, you probably have a laptop or tablet in your bag. When using these terminals outdoors, the problem is the battery. If power is wasted, it may not be possible to use it when it is most important. In order to prevent the battery from running out, it is important to know the characteristics of the battery and use it wisely. So let's learn the basics of batteries and new common sense.

Q1 Why does the battery wear out?

As the battery is repeatedly charged and discharged, the capacity that can be charged naturally decreases. This is due to the characteristics of the battery. When I checked the notebook computer "Let's Note RZ4" purchased about three and a half years ago, it was possible to use up to 36,020 mWh at the beginning, but now it has decreased to 27,470 mWh. It is 24% worse than when shipped from the factory.

The main cause of deterioration is internal chemical changes. A rechargeable battery has positive and negative electrodes inside, and lithium ions move between them to charge and discharge. However, if it is used for a long time, a thin film will form on the positive electrode, making it difficult for ions to pass through, and the performance of the battery will deteriorate.

Q2　How long is the battery life?

In general, the life of the battery is said to be less than half of the maximum capacity at the time of shipment from the factory. How soon will it be less than half? This also depends on the performance of the battery, but many manufacturers aim for about 300 to 500 times (recently, some can be used 600 to 800 times due to improvements that slow down deterioration).

The number of charging times is a mechanism that counts as one charge when charging from 0 to 100%. In the case of replenishment charging, a total of 100% charging will be one charge. The number of charging times is counted as 1 charge when charging 100% like 0 to 100%. Also, even if you add 60% and 40% and charge it, it will be one charge when the total reaches 100%. You can check the number of times the battery has been charged using the manufacturer's software.

Gone are the days when you had to deplete your battery before recharging it. The reason why recharging was said to be bad is because there was a deterioration phenomenon called "memory effect". However, this is the case with nickel-cadmium rechargeable batteries and nickel-metal hydride rechargeable batteries. Lithium-ion rechargeable batteries, which are currently the mainstream, do not cause memory effect, so it is okay to recharge.

Avoid 0% or 100% states instead.

Verification of the value of the 100-yen charging cable Faster than the genuine product?

Slime on a pipe chair... Exploring a 100-yen mystery hit product