Button battery 3V alkaline coin cell batteries CR2016 CR2025 CR2032 with 20mm diameter and 3.2mm height for watches calculators small electronics and key fobs
Button battery 3V alkaline coin cell batteries CR2016 CR2025 CR2032 with 20mm diameter and 3.2mm height for watches calculators small electronics and key fobs
3V Alkaline Button Batteries in CR2016, CR2025, and CR2032 Sizes for Small Electronic Devices
These 3-volt alkaline button batteries are designed to power a wide range of compact electronic devices where space is limited but consistent voltage is essential. As a standard coin cell format with a 20mm diameter, they are a direct replacement for many common applications. The availability in three specific model numbers—CR2016, CR2025, and CR2032—covers the most frequent requirements for watches, calculators, key fobs, and various small gadgets. Their alkaline construction provides a reliable, shelf-stable source of energy suitable for the typical low to moderate drain profiles of such electronics.
Features and Construction
The primary functional feature of this battery is its standardised 3V output, which matches the requirements of countless small electronic circuits. Its physical construction follows the common button battery form factor, making it interchangeable with many existing battery compartments.
Material and Build
Constructed using alkaline chemistry, the battery offers a practical balance of energy density and stability. Alkaline cells are widely used in consumer electronics for their consistent discharge curve and good shelf life, making them a practical choice for devices that may sit unused for periods before requiring power.
Size and Practical Fit
All three model variants share a universal 20mm diameter, ensuring compatibility with standardised battery holders. The key differentiator is the height: the CR2032 model is 3.2mm tall, while the CR2025 and CR2016 are progressively thinner versions. This height variance is critical for fitting into specific, often shallow, device compartments, so verifying the exact model number required by your device is essential.
Uses and Placement
These batteries are intended for low-drain electronic devices where their compact size and stable voltage are primary advantages. Their use is defined by the device manufacturer's specifications, not by the battery's inherent capabilities.
Event or Professional Use
In professional or event settings, these batteries serve as reliable power sources for equipment like handheld calculators, presentation clickers, or back-up lighting in small instruments. Their standardised form factor means they can be stocked as a generic replacement part for a variety of office or event technology.
Everyday Home Use
For everyday home use, these batteries are most commonly found in watches, kitchen scales, digital thermometers, keyless entry fobs, and children's toys. The 3V output is sufficient for the LED displays, simple processors, and wireless transmitters used in these common household items.
Benefits and Buying Value
The value of these batteries lies in their standardisation and specificity. They are not a generic power solution but a targeted component for devices engineered around this precise power source.
Reuse and Low Maintenance
As a single-use, non-rechargeable cell, the product's value is in its initial performance. There is no maintenance required; the battery is used until depleted and then replaced. Its alkaline chemistry offers a predictable lifespan under normal conditions within the specified device.
Why Choose This Product
This product is a direct match for devices specifying a 3V button battery in the CR2016, CR2025, or CR2032 format. The choice is dictated by device compatibility rather than brand preference. Ensuring you purchase the correct model number (often stamped on the old battery or listed in the device manual) is the most important buying consideration to guarantee proper fit and function.
