You have likely been flustered by your smartphone battery draining unusually fast when the weather gets cold. A phone that works perfectly fine at home might suddenly shut off outside with only 301% remaining. In most cases, this is due to the nature of lithium-ion batteries rather than a malfunction, so if you understand the principles and how to deal with it, you can use your phone with much greater peace of mind even in winter.
1. Why does the battery drain quickly when it is cold?
- Most smartphone batteries use the lithium-ion method, and when the temperature drops, the chemical reactions inside the battery slow down and the power to discharge electricity weakens.
- Therefore, even if there is remaining capacity, the phone may turn off by itself due to a drop in voltage. This is why it turns back on and the remaining charge returns to some extent once you enter a warm room.
- While brief exposure to cold is usually temporary, the habit of charging at sub-zero temperatures should be avoided as it can permanently reduce battery life.
2. Storage tips to follow when going out
- Keep it close to your body, like an inner pocket of your clothes, rather than an outer pocket of a bag, to keep it warm with your body heat.
- Do not leave your phone in a parked car. The inside of the car cools down as quickly as the outside temperature.
- If you have to stay out for a long time, you can save battery by turning on low power mode, lowering screen brightness, and downloading maps, tickets, and contacts in advance.
- Power banks also do not charge properly if they have cooled down. Please keep your power bank warm before using it as well.
3. Do not charge a cold phone immediately.
- Charging a battery that has frozen below freezing immediately can cause internal damage, potentially permanently reducing its capacity. Please bring the battery indoors and let it warm up to near room temperature for about 20 to 30 minutes before charging. If water droplets (condensation) have formed on the surface, it is recommended to wait even longer.
- If your phone turns off due to the cold, please wait until it warms up indoors before turning it on. It is best not to try to force it to turn on repeatedly.
- If the battery is swollen or the phone is deformed, do not press on it or continue using it; please have it checked.
In most cases, battery discharge during the winter is a 'cold reaction' rather than a 'malfunction.' You just need to remember two things: keep it warm, and if it freezes, heat it up before charging. This article provides general information, and if the same symptoms persist even after keeping it warm, you may need to have the battery checked for aging.
Source: Verizon — 5 Ways to Keep Your Phone Alive in Sub-Freezing Temps
https://www.verizon.com/about/news/5-ways-keep-your-phone-alive-sub-freezing-temps
Source: HowAtlas — Why Phone Batteries Die Fast in the Cold
https://www.howatlas.com/2026/05/phone-battery-cold-drain.html |
