Medical Batteries

No. These are featured options for medical applications. Explore our full product pages for additional choices.

Batteries do not have an MSL (Moisture Sensitivity Level) specification like semiconductor components.

Micro batteries are tightly sealed using methods such as crimping or laser welding, so short-term storage (approximately 1–2 months) at normal temperature and humidity generally has little impact from moisture. However, please observe the following precautions:

• Storage conditions: Keep batteries in an indoor environment at normal temperature and humidity until use.
• Long-term storage: Over extended periods, moisture ingress through the sealing area or electrolyte evaporation may occur, potentially impacting internal materials and leading to degradation.
• Rapid environmental changes: Sudden changes in temperature or humidity can cause condensation, leading to corrosion or deterioration of electrical characteristics. Avoid abrupt fluctuations.

We do not provide SPICE models for batteries.

Battery voltage behavior varies significantly depending on ambient temperature, battery condition (including degradation from storage or discharge), and discharge current profile (such as peak currents and pulse loads).

Therefore, we offer voltage drop calculations and lifetime estimations based on your specific operating conditions, along with design recommendations.

For detailed calculations, please contact us with the usage condition (e.g., load and temperature conditions).

SR batteries: approximately 3% to 5% per year, CR batteries: approximately 1% per year (reference values for storage at 20 ℃).

These figures are estimates derived from accelerated tests under high-temperature storage and are not guaranteed values. Actual self-discharge rates vary depending on battery specifications and operating conditions.

• Long-term storage (several years) or high-temperature environments: Self-discharge tends to accelerate, which can shorten battery life.
• Temperature dependency: Higher temperatures increase self-discharge.
• Other factors: Discharge state and degree of degradation also affect the rate.

For detailed calculations, please contact us with the usage condition (e.g., load and temperature conditions).

Battery life and performance are significantly affected by environmental factors including temperature, humidity, and discharge conditions. In particular, high-temperature and high-humidity environments can accelerate degradation as follows:

• High temperature: Increased self-discharge leading to capacity loss, higher internal resistance, electrolyte decomposition, and gas generation.
• High humidity: Moisture ingress into the battery may accelerate the deterioration of internal materials and components.

Typical degradation modes:

• Capacity loss due to accelerated self-discharge
• Electrolyte evaporation, decomposition, and deterioration
• Swelling caused by gas generation
• Increase in internal resistance
• Degradation of structural materials such as electrolyte, active materials, and components like gaskets

The temperature range specified in the catalog represents short-term permissible limits. Continuous storage or use near the maximum temperature is not recommended.

Since battery life and performance vary depending on actual conditions, we provide lifetime estimation and design advice tailored to your application.

Internal resistance varies significantly depending on the battery type, model, and operating conditions.

We do not publish a single catalog value for internal resistance because it changes based on the following factors:

• Temperature conditions: Resistance increases at low temperatures and decreases at high temperatures.
• Battery condition: Changes due to storage-related degradation or discharge progression.
• Load conditions: Variations caused by pulse currents, peak currents, and discharge duration.

Based on your specific operating conditions, we perform simulations and provide optimal design recommendations.

For detailed calculations, please contact us with the usage condition (e.g., load profile and temperature conditions).

Whether batteries can be used in MRI or X-ray environments depends on the battery specifications.

In general, micro batteries use ferrous materials and stainless steel for their casing. Even materials considered non-magnetic, such as austenitic stainless steel (SUS300 series), may become slightly magnetic due to crimping during the sealing process. In addition, terminals and internal components may contain magnetic materials.

For this reason, we do not recommend using batteries in MRI environments. However, some customers choose to use them at their own discretion. In such cases, please ensure that all necessary validation is performed under your responsibility.

For detailed information or to check specifications, please contact us.

Sterilization may affect battery performance and service life. The extent of the impact varies significantly depending on sterilization conditions such as temperature, duration, gas concentration, and vacuum level, so there are no general recommended guidelines.

Therefore, if you are considering sterilization, please contact us in advance. We will review the conditions and propose evaluation methods as needed.

We recommend manual soldering for mounting CR batteries. Other soldering methods (such as reflow, dip, or wave soldering) are prohibited.

Important precautions:

• Do not solder or weld directly to the battery body.
  Heat from soldering or welding can damage insulation or internal structures, which may cause deformation, leakage, overheating, rupture, or even fire.
• If soldering is required, perform manual soldering only on batteries equipped with terminals or lead wires.
• Keep the soldering iron tip temperature at 350 °C or below, and limit soldering time to within 5 seconds, as short as possible.
• Avoid applying excessive solder. Excess solder may flow onto the PCB, causing short circuits or unintended connections to power lines, which could lead to battery charging and severe hazards.

For SR batteries:

Recommended soldering conditions differ from those for CR batteries.

Please contact us for details on SR battery soldering requirements.

Accurate battery life prediction requires calculations that take into account actual load conditions, temperature, and storage environment. Battery life is primarily determined by two factors:

Capacity consumption: The total discharge capacity, including storage-related self-discharge and leakage current from the device. Note that capacity is consumed even when not in active use.

Pulse current tolerance: High-current pulses can cause temporary voltage drops, which may lead the battery voltage to fall below the device’s minimum operating level—even if capacity remains. This effect is more pronounced in low-temperature environments due to reduced reactivity.

To maximize device operating time, it is essential to design with full consideration of real-world conditions, including degradation during use.

We offer simulations and design recommendations based on your specific operating conditions.

Please contact us to review your requirements (such as load profile and temperature conditions), and we will provide calculation results and advice.

Battery terminals are available in various configurations, including surface-mount terminals, through-hole terminals, and wire connector types.

Standard specifications are provided on each product page and in product datasheets or dimensional drawings.

We can also propose terminal configurations not listed on our website. However, please note that custom specifications may involve constraints such as minimum order quantity (MOQ), lead time, and additional costs.

Dimensional drawings for standard products with terminals or wire connectors (CR batteries, Heat resistant CR batteries, cylindrical CR batteries) can be found on the respective product pages.

For customization inquiries, please contact us.

Batteries are typically packed using molded resin trays as the standard packaging method. Multiple trays loaded with batteries are consolidated into paper carton boxes for shipment.

Conditions and notes:

• The resin tray material, carton size, and weight vary depending on battery type and shipping method.
• Minimum order quantity (MOQ) also varies by product specification.
• Please contact us in advance for detailed packaging specifications and MOQ.
• Transportation of lithium batteries is subject to international regulations, which impose restrictions on packaging and shipping methods.

For details, please refer to the following document: Update on Dangerous Goods Transportation Regulations for Lithium Cells and Batteries

Battery model numbers follow IEC and JIS naming conventions, which indicate the battery type and dimensions. Select the appropriate model and size based on the application and device space constraints.

Naming convention highlights:

Model numbers generally consist of: Battery system + shape + diameter (mm) + height (in 0.1 mm units)

Examples:

• CR2032: Diameter 20 mm, height 3.2 mm, lithium manganese dioxide primary battery
• CR2450: Diameter 24 mm, height 5.0 mm, lithium manganese dioxide primary battery

You can choose from different diameters and heights to accommodate device space or height limitations.

Product lineups are available on each product page.

You can also refer to the quick reference chart for button and coin cell batteries handled by major domestic and international manufacturers.

Evaluation samples are available through our company or authorized regional distributors.

Please submit your request via the inquiry form, including product and project details such as device information, battery type under consideration, estimated annual demand, end-user information, and destination country.

Sample provision conditions:

Samples are provided for corporate use only (we do not sell to individual customers).

An NDA or confirmation of usage conditions may be required.

Lead time varies depending on battery type and application, so please contact us first.

Sample provision process:

1. Submit your request via the inquiry form
2. Review of usage conditions (e.g., load and temperature) and quotation
3. Sample shipment

Using button batteries in series is generally not recommended, but it can be done with proper safety design. If you plan intend to use batteries in series, please consult us in advance.

Please pay attention to the following points:

• Risk of polarity reversal: At the end of discharge, over-discharge may cause gas generation and internal pressure increase, leading to leakage or rupture.
• Preventive measures: Control the cutoff voltage on the device side and stop operation at the voltage specified by us (details will be provided based on the battery configuration).

Design considerations:

• Use batteries from the same manufacturer and the same lot.
• Avoid mixing new and used batteries or different types.
• To minimize risk and optimize performance, please consult us at the initial design stage for comprehensive safety recommendations.

With appropriate safety design, series connection can be an effective way to maximize device performance. For details, please contact our technical support team.