When you live in a place that has cold weather, you know to keep jumper cables in your vehicle because there’s a good chance you or someone you know will have a dead battery. If you use your phone in really cold weather, its battery life drops, too. Why do batteries die quicker in cold weather?
The electric current generated by a battery is produced when a connection is made between its positive and negative terminals. When the terminals are connected, a chemical reaction is initiated that generates electrons to supply the current of the battery. Lowering the ambient temperature causes chemical reactions to proceed more slowly, so a battery used at a low temperature produces less current than at a higher temperature. As cold batteries run down they quickly reach the point where they cannot deliver enough current to keep up with the demand. If the battery is warmed up again it will operate normally.
Imagine the battery’s chemical reaction is similar to a river. If the river is frozen the water doesn’t flow very well. Well, inside the battery, that chemical reaction is what supplies the electrical current. If the chemical reaction is limited due to the cold temperatures, like the river, it is going to supply a lot less current than it would if it where a normal warmer temperature.
If you have a battery that is already aged (1-2 years old for most Smart Phones & Tablets). You will notice a substantial drop in battery performance rather quickly in colder temperatures.