As a subject matter expert in the field of battery technology, I am often asked about the impact of temperature on battery performance and longevity. The relationship between temperature and battery life is indeed complex and multifaceted. Let's delve into this topic with a comprehensive analysis.

Firstly, it's important to understand that batteries are chemical devices that convert stored chemical energy into electrical energy. The efficiency of this conversion process is influenced by various factors, including temperature.

The statement that **cold batteries hold their charge longer than room temperature batteries** is partially correct, but it requires some clarification. In general, batteries can maintain their charge for a longer period when stored in a cool environment. This is because lower temperatures slow down the chemical reactions within the battery, which in turn reduces the rate of self-discharge. Self-discharge is the process by which a battery gradually loses its charge over time even when not in use.

However, it's also true that **hot batteries don't hold charge as well as room temperature or cold batteries**. High temperatures can accelerate the rate of chemical reactions within the battery, leading to increased self-discharge. Moreover, extreme heat can cause irreversible damage to the battery's internal components, thereby reducing its overall lifespan.

The claim that **cold batteries discharge faster than warmer batteries** is a bit misleading. In reality, the rate of discharge is more about the load on the battery and the type of battery in question. For instance, a battery under a heavy load will discharge faster regardless of the temperature. However, it is true that the performance of a battery can be affected by temperature. Cold temperatures can increase the internal resistance of a battery, which may result in a reduced ability to deliver power, especially under high load conditions.

When it comes to practical advice, it is suggested that if you're using a battery in cold conditions, it might be beneficial to keep a warm one in reserve. This is because the cold can affect the battery's ability to deliver power effectively. Having a warm battery ready can ensure that you have a reliable power source when needed.

In summary, the longevity of a battery is influenced by temperature, with cooler temperatures generally being more favorable for preserving charge. However, the performance of a battery, particularly under load, can be compromised in cold conditions due to increased internal resistance. It's also crucial to avoid exposing batteries to extreme heat, as this can lead to accelerated self-discharge and potential damage to the battery's components.

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It turns out that not all batteries benefit from the cold however: A number of studies have shown that storing batteries in the freezer helps them retain their charge longer. ... Alkaline batteries stored at "room temperature" self discharge at a rate of less than two percent per year.read more >>