Storing Camera Batteries: Charged Or Not?

Storing camera batteries is a topic that is often debated among photographers, and it can be difficult to know what to do. The first thing to consider is the type of battery you are using. Different types of batteries require different storage conditions. For example, Li-ion and NiMH batteries should be stored at a full charge and protected from extreme temperatures, while LiFePO4 batteries should be stored at around 50% charge and kept at room temperature. Temperature is another important factor when storing camera batteries. Li-ion and NiMH batteries should be stored at a temperature between 4°C and 20°C (39°F and 68°F). LiFePO4 batteries should be stored at temperatures between 10°C and 25°C (50°F and 77°F).

Li-ion and NiMH batteries should be stored at a full charge

Storing camera batteries, especially Li-ion and NiMH batteries, at a full charge is generally not recommended. While it is crucial to ensure that these batteries are not stored in a discharged state, keeping them at full charge for extended periods can also lead to potential issues. Here are some insights on why Li-ion and NiMH batteries should be stored at a full charge:

Li-ion Batteries

Li-ion batteries, commonly found in devices like cameras, cell phones, and laptops, have specific storage considerations. While they offer advantages such as higher energy density and better performance in extreme temperatures compared to NiMH batteries, optimal storage practices are essential to maintain their longevity.

It is recommended to store Li-ion batteries at a partial charge rather than a full charge. This is because storing them at a full charge can lead to faster capacity loss over time. The ideal storage charge for Li-ion batteries is between 30% and 50% of their capacity. Storing them at this charge level helps maximize their lifespan and ensures they are ready for use when needed.

Additionally, it is crucial to store Li-ion batteries at the right temperature. They should be kept in a cool, dry place, preferably at room temperature or below. Extreme temperatures can accelerate the self-discharge rate and negatively impact the battery's performance and lifespan.

NiMH Batteries

NiMH batteries, which have largely replaced older nickel-cadmium batteries, offer advantages such as higher capacity and the ability to be partially discharged and recharged multiple times without losing capacity. However, they also have specific storage requirements to ensure optimal performance and longevity.

Unlike Li-ion batteries, NiMH batteries can be stored for extended periods in either a charged or discharged state without detrimental effects, as long as they are not exposed to extreme temperatures. This flexibility makes them convenient for long-term storage.

However, it is important to note that NiMH batteries can experience voltage depletion over time, even though they technically do not have a "memory effect." To mitigate this, it is recommended to occasionally discharge and then fully recharge NiMH batteries, ideally once every three months. This helps maintain their performance and ensures they are ready for use when needed.

In summary, while it is essential to avoid storing Li-ion and NiMH camera batteries in a fully discharged state, storing them at a full charge is also not advisable. The optimal storage charge for these batteries falls within the 30% to 75% range, depending on the specific battery type. Additionally, proper storage temperatures and periodic recharging for NiMH batteries are crucial for maintaining their performance and longevity.

LiFePO4 batteries should be stored at around 50% charge

Camera batteries should be stored at around 50% charge. This is because lithium-ion batteries, which are the most common type of rechargeable batteries, can be stored for longer periods of time at this charge level. Storing lithium-ion batteries at 100% charge can damage the battery and reduce its capacity over time. On the other hand, storing them at 0% charge can also cause permanent damage to the battery. Therefore, it is recommended to store lithium-ion batteries at around 50% charge to maintain their health and longevity.

LiFePO4 batteries, a type of lithium-ion battery, are widely used and preferred due to their low self-discharge rate, no maintenance needs, and high charge-retaining qualities. These batteries are also equipped with a Battery Management System (BMS) that protects them from overcharging and balances the cells. However, the storing process for these batteries is a bit tricky. If stored improperly, it can damage the internal structure of the battery.

It is recommended to store LiFePO4 batteries at around 50% charge or ideally, in a fully charged condition. These batteries usually have a very low self-discharge rate of about 2% per month. This means that when stored, they will lose 2% of their monthly charge. Therefore, it is important to ensure that no load draws additional charge and power from the battery during storage. Storing the battery at a higher charge level will help maintain its charge retention power during storage.

If you store your LiFePO4 battery at a low or zero charge state, it can lead to irreversible damage. This is because if the battery does not have enough charge, the self-discharge of 2% per month can cause the discharge level to reach a limit where even the BMS cannot protect the battery. Therefore, it is recommended to store LiFePO4 batteries at more than 50% charge to ensure their safety.

For long-term storage, LiFePO4 batteries should be maintained with a full cycle (charged and discharged) once every 6-12 months and then stored at 50% charge. The storage space should be dry and indoors, away from direct exposure to sunlight. Additionally, the temperature during storage should be low, ideally below freezing, to slow down the calendar aging process.

In summary, LiFePO4 batteries should be stored at around 50% charge to maintain their health and longevity. Proper storage techniques can enhance the useful life of these batteries, while inappropriate storage methods can damage their internal structure. By following the recommended storage guidelines, you can ensure the optimal performance and longevity of your LiFePO4 batteries.

Store batteries at the correct temperature to prevent damage

Storing batteries at the correct temperature is essential to prevent damage and performance issues. The ideal storage temperature for most batteries is around 15°C (59°F), with slight variations between 5°C (41°F) and 20°C (68°F) deemed safe. However, extreme temperatures below -5°C (23°F) or above 35°C (95°F) can cause significant problems, especially for lead-acid batteries.

At very low temperatures, the battery's electrolyte becomes less conductive, leading to an increase in internal resistance and a decrease in voltage. This can cause irreversible damage to the battery if the voltage drops below a critical level. Additionally, extremely low temperatures can cause batteries to enter a "sleeping" mode, requiring special chargers for revival.

On the other hand, high temperatures accelerate chemical reactions within the battery, increasing the self-discharge rate and reducing stored capacity. This can lead to material degradation, permanent capacity loss, and safety risks, especially in lithium-ion batteries, which may catch fire or explode when overheated.

Therefore, it is crucial to store batteries within the recommended temperature range to maintain their performance and longevity. For lithium-ion batteries, this range is typically between -5°C (23°F) and 35°C (95°F), while for lead-acid batteries, it is between 0°C (32°F) and 30°C (86°F).

To ensure optimal performance and safety, always refer to the manufacturer's guidelines for specific storage temperature recommendations and precautions for your particular battery type.

Use an appropriate battery charger

Using an appropriate battery charger is essential for maintaining the health and longevity of your camera batteries. Here are some detailed instructions and tips for doing so:

• It is recommended to use the battery charger that came with your camera or one specifically designed for your camera model. This ensures compatibility and safe charging.
• Before charging, always refer to the user manual for your camera battery to familiarise yourself with any specific instructions or precautions.
• When charging, make sure the camera is turned off. Charging while the camera is on may not be possible or may hinder the process.
• Connect the camera with the battery inserted to the charger. Typically, this involves using a USB cable and a wall power adapter. Ensure the power cable is compatible with your camera in terms of connectors, voltage range, and current.
• Plug the charger into a nearby wall outlet. Charging via a wall outlet is generally more reliable than via a computer USB port, as the latter may not provide sufficient power.
• Allow the battery to charge until it is fully charged. The charging time will vary depending on the battery's remaining capacity and charging conditions. Refer to your camera's manual for specific charging times.
• Once fully charged, disconnect the charger from the power source and the camera. Properly store the battery or insert it into the camera if you're ready to use it.
• It is important to use only genuine and compatible charging accessories, including cables, adapters, and chargers. Using non-compatible or low-quality accessories may damage your battery or camera.
• Regularly clean the battery terminals and camera charging slot to ensure optimal contact and efficient charging. Keep them dry to prevent any potential issues.
• Avoid exposing the batteries or camera to extreme temperatures, open flames, excessive heat, or strong magnetic fields. These can be detrimental to the battery's performance and safety.
• If you have a choice of power banks, select one that can deliver the appropriate voltage for your camera. Too high a voltage may damage the equipment, while too low may result in slow charging or failure.
• When charging, monitor the battery and charger for any signs of overheating. If the battery becomes hot, discontinue charging and refer to the manufacturer's instructions for guidance.
• Finally, always follow the manufacturer's guidelines for charging, storage, and usage. This will help prolong the life of your camera batteries and ensure safe operation.

Store batteries in the correct containers

When storing camera batteries, it is important to use the correct containers to ensure safety and maintain battery life. Here are some tips for storing batteries in the correct containers:

• Use a dedicated battery storage container: Look for containers specifically designed for battery storage. These containers often have adjustable dividers to accommodate different battery sizes and snap lids to keep the batteries secure.
• Choose a suitable size: Select a container that can accommodate the number and type of batteries you need to store. Some containers hold as few as four batteries, while others can hold over 200. Choose a size that suits your needs.
• Opt for clear or transparent containers: Clear or transparent containers allow you to easily identify the type and number of batteries stored inside. This helps in quickly finding the right battery when you need it.
• Consider additional features: Some battery storage containers come with testers to check battery charge levels. Others are labelled with the type of battery they hold. These features can help you stay organised and ensure you're using the right batteries.
• Store in a cool, dry place: Choose a storage location that is cool and dry, as extreme temperatures and moisture can affect battery performance and lifespan. Avoid storing batteries in direct sunlight or in damp areas.
• Follow battery-specific storage guidelines: Different types of batteries, such as lithium-ion batteries, may have specific storage guidelines. For example, lithium-ion batteries should not be stored fully discharged, and it is recommended to store them at about a 50% charge for long-term storage. Always refer to the manufacturer's instructions for the specific type of battery you are storing.

Frequently asked questions