English
Views: 0 Author: Site Editor Publish Time: 2026-05-29 Origin: Site
Lithium-manganese button batteries under the CR series are the most widely used miniature disposable power sources for modern low-power electronic devices. From daily consumer gadgets and smart home sensors to automotive electronic modules and industrial precision instruments, different CR battery models can be seen everywhere. Many users only know the common names of these batteries but lack a clear understanding of their model coding rules, parameter differences, performance characteristics and applicable scenarios. This article systematically popularizes the full range of CR series battery model knowledge, helping you quickly distinguish specifications, master matching logic, and select the most suitable CR button battery.
CR series batteries refer to round lithium-manganese dioxide primary button batteries, which comply with unified international industrial naming standards. Each letter and number in the model represents a fixed attribute, covering battery chemistry, shape, diameter and thickness, forming a standardized and intuitive coding system.
Code Meaning Explanation
The prefix “CR” is the exclusive identifier for lithium-manganese button batteries: The letter “C” stands for lithium-based chemical system, and “R” indicates a round, button-shaped cell. All CR batteries feature a unified nominal voltage of 3.0V, which is the core feature that distinguishes them from 1.5V alkaline button batteries and 1.55V silver oxide button batteries.
The four digits following the CR prefix represent the battery’s physical dimensions: The first two digits indicate the battery diameter in millimeters (mm), while the last two digits represent the battery thickness in 0.1-millimeter units. For example, CR2032 means a round lithium-manganese battery with a diameter of 20mm and a thickness of 3.2mm.
The CR series has a complete product matrix, among which CR2032, CR2025 and CR2016 are the three most mainstream and universal models in the market. They share the same lithium-manganese chemical system, 3.0V stable voltage and safety performance, and only differ in size, capacity and endurance, adapting to equipment with different space structures and power consumption demands.
As the most versatile model in the CR series, CR2032 has a diameter of 20mm and a thickness of 3.2mm, with a typical standard capacity of 220mAh. It boasts the largest capacity and longest service life among the three mainstream 20mm-diameter models. With strong compatibility, it fits most standard battery holders on the market.
Main Application Scenarios: Computer motherboard BIOS backup power supply, car remote key fobs, electronic scales, blood pressure monitors, smart wearable devices, and high-power-consumption miniature sensors.
CR2025 features a diameter of 20mm and a thickness of 2.5mm, with a typical capacity of about 170mAh. It is thinner and lighter than CR2032, with moderate capacity and balanced endurance performance. This model is specially designed for thin-profile electronic products with limited internal installation space.
Main Application Scenarios: Slim TV and air conditioner remote controls, portable electronic thermometers, thin smart door lock sensors, and mini medical detection devices.
With a diameter of 20mm and a thickness of 1.6mm, CR2016 is the thinnest of the three mainstream models, with a typical capacity of around 90mAh. Its ultra-thin body meets the ultra-miniaturized design requirements of high-precision electronic equipment, though its capacity and endurance are relatively lower.
Main Application Scenarios: Ultra-thin car keys, miniature timing devices, portable wireless sensors, and tiny industrial control modules.
To clearly distinguish the differences between core CR series models, the key parameters are summarized as follows:
Model | Diameter | Thickness | Typical Capacity | Core Features | Applicable Equipment |
|---|---|---|---|---|---|
CR2032 | 20mm | 3.2mm | 220mAh | Large capacity, long endurance, strong compatibility | Standard-size equipment with high endurance requirements |
CR2025 | 20mm | 2.5mm | 170mAh | Slim body, balanced performance | Thin-profile household and portable devices |
CR2016 | 20mm | 1.6mm | 90mAh | Ultra-thin, lightweight | Ultra-miniaturized precision equipment |
All standard CR lithium-manganese button batteries share consistent core performance, regardless of size differences, which is the key reason for their wide industrial application:
Stable 3.0V voltage output: All models maintain a flat discharge curve, providing stable power for precision circuits and avoiding equipment failure caused by voltage drop.
Ultra-long shelf life: Featuring ultra-low self-discharge rate, all CR batteries have a storage life of 8 to 10 years under normal room temperature and dry conditions, suitable for long-term standby equipment.
Wide temperature adaptability: The working temperature range covers -20°C to +60°C, ensuring stable operation in complex environments such as low temperature outdoors and high temperature in vehicle interiors.
High safety consistency: Adopting fully sealed metal crimping structure, all models have excellent leakage resistance, compression resistance and impact resistance, with stable and controllable safety performance.
In actual use, the selection of CR series models follows the core logic of size matching first, endurance matching second. Since the three mainstream models have the same diameter but different thicknesses, they cannot be通用互换. A thicker battery cannot be installed in a thin battery compartment, while a thinner battery will cause poor contact and power failure due to insufficient fitting.
In addition, users should not blindly pursue large capacity. For ultra-thin mini devices with low power consumption, CR2016 and CR2025 are more suitable and space-saving; for standard equipment requiring long-term standby and high endurance, CR2032 is the optimal choice.
It is worth noting that all CR series batteries are non-rechargeable primary batteries. No matter which model is used, charging, disassembly and short circuit are prohibited to avoid safety hazards.
The complete model system of CR series lithium-manganese button batteries is built on unified international standards. With clear coding rules and differentiated size and capacity design, CR2032, CR2025 and CR2016 cover almost all application scenarios of miniature low-power electronic devices. Understanding the model classification, parameter differences and matching rules of CR batteries can help users accurately select products, avoid installation and adaptation problems, and give full play to the stable performance and long-endurance advantages of lithium-manganese button batteries.
