[Answered] How Long Does a CR2032 Battery Last in A Red Dot Sight?

The CR-2032 batteries are coin-cell batteries that are most commonly used in computer motherboards, car key fobs, and red dot sights as well. This battery is non-rechargeable and because of that, many hunting enthusiasts wonder how long it lasts in a red dot sight.

Generally, a CR-2032 battery will last about 35,000 to 50,000 hours or in simpler terms, 4-5 years. However, the battery life depends on the use and some other factors as well.

Here in this article, we will discuss this more in detail and see how different factors come into play when it comes to the CR-2032 battery lasting in a red dot sight.

How Long Does a CR2032 Battery Last in A Red Dot Sight

How Much Battery Life Does a CR2032 Battery Have in A Red Dot Sight?

As stated before, the average lifespan of a CR-2032 battery in a red dot sight is about 4-5 years. But it also depends on how frequently and for how long you’re using the red dot sight.

The general rule of thumb is the more you use it, the faster the battery will drain. However, the battery life of a coin-cell battery like the CR-2032 also depends on things like material quality, storage conditions, storage time, physical damage, and even humidity and temperature can have an effect as well.

It’s worth noting that there are different types of red dots. And each consumes battery differently. Boom! The battery life just got affected by the type of red dot you’re using as well.

Now, no one wants to replace their red dot sight batteries every few months. So, in this next section, we’ll discuss how you can expand the battery life of a CR-2032 in your red dot sight.

How Can You Make the CR2032 Battery Last Longer in Your Red Dot Sight?

Here’s what you can do to make your life easier and not replace your red dot sight batteries so frequently –

1. Turn Off the Red Dot Sight After Use

This is so easy yet most of us seem to somehow forget to turn off the red dot sight after use. As the CR-2032 battery is very small, it will drain faster if it is being used continuously for a long period. So, don’t forget to turn off the red dot sight after use.

2. Examine the Material Quality

If the quality of the battery is compromised in any way, it will shorten the battery life. So, ideally, you’d want the CR-2032 batteries made with high-quality materials. So even if you use the red dot very frequently, the battery will not drain so fast.

3. Keep the Red Dot in A Controlled Environment

The CR-2032 is a lithium coin-cell battery that survives more in a cool and dry place. So, you’d want to keep the red dot in a climate-controlled and dry place while the CR-2032 battery is in the red dot. This will help elongate the life of the CR-2032 battery in your red dot.

4. Keep the Red Dot and CR2032 Battery Out of Harm’s Way

Any kind of physical damage will significantly reduce the battery life of a lithium coin-cell battery like the CR-2032. So, make sure the red dot is safe and not getting damaged in any way while the CR-2032 battery is inside it.

Frequently Asked Questions (FAQs)

How do I know if my CR2032 is still good?

A CR2032 battery has about 10 years of lifespan if stored properly. Check for the manufactured date and if no other physical damage has been caused, it should be working fine.

Can a red dot sight harm my eyes?

No, a red dot sight can not harm your eyes. It uses a light-emitting diode that is completely safe for the eyes.


In conclusion, the CR-2032 battery in a red dot lasts longer if you use it carefully. Turn off the red dot after using it and keep it in a safe place for its longevity. We hope we were able to help you understand how long the CR2032 battery lasts on a red dot sight. If you need further assistance, please do not hesitate to contact us via the comment section.

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