In this day and age, I think a smartphone is becoming a must-have item. I came across an online report about the charging method which can reduce smartphone's lifespan. I would like to summarize and share some of the interesting points here. I've got everything on my smartphone. What would I do without it? I guess many people feels that way like me. Unfortunately, the price has been getting more expensive lately and more people might want to keep using their phones as long as possible. However, when it has been two years since you got the phone, the lifespan of its battery is getting shorter and shorter. The report said there are some behaviors to avoid when charging a smartphone. 1) Operating a smartphone while charging it. It makes its temperature higher and puts excessive strain on battery. 2) Charging a lot at a time. The battery can be damaged if you start charging after it is less than 20% remaining. So, you should start charging the battery before it is less than 25% remaining. 3) Keep charging a battery with full charge. You should stop charging it up to 90%. 4) Charging a battery under hot and humid circumstances. That can cause a battery to catch fire. Safety comes first and you never charge a battery in that kind of situation such as a bathroom and a sink. I don't think I can seem to buy a smartphone in the future because it is a bit pricey. So, I'll follow this instruction from now on.