The CR1/2AA (CR14250) Li-MnO₂ battery is designed for applications where available space matters just as much as operating life.
At approximately 14 mm in diameter and 25 mm in height, the cell occupies considerably less volume than larger cylindrical lithium batteries. This makes it suitable for compact electronic products that remain powered continuously at a low current, preserving data, timekeeping functions, sensor operation, or standby circuitry over long periods.
Rather than targeting high-power equipment, CR14250 is better matched to devices with low continuous consumption and occasional light pulse loads.
Compact Power for Space-Constrained Electronics
Many embedded electronics cannot accommodate a large battery compartment. In PLC modules, control boards, portable instruments, and miniature sensing devices, every millimeter of internal space can influence product layout.
The CR1/2AA format provides a compact primary lithium option while maintaining the relatively high 3.0V nominal voltage associated with Li-MnO₂ chemistry.
This allows product designers to reduce battery volume without immediately sacrificing the long-duration standby characteristics required by the device.
Well Suited to Low-Drain Standby Operation
CR14250 is particularly useful in electronics that draw very little current for most of their operating life.
Typical functions include maintaining an RTC clock, preserving configuration data, supporting CMOS memory, recording sensor information, or keeping a small monitoring circuit active while the main system is powered down.
Where a device occasionally wakes to measure, record, display, or transmit a small amount of data, the cell can also support light intermittent pulse demand within the limits of the application.
Typical Applications
Memory Backup & Industrial Control
Used for RTC and CMOS backup in computer motherboards, PLC control systems, CNC equipment, industrial computers, and other electronics that need to preserve time or stored settings when the primary power source is unavailable.
Compact Medical Electronics
Suitable for selected small medical devices such as portable glucose meters and compact ambulatory monitoring equipment where internal space is limited and power demand remains relatively low.
Miniature Sensors & Data Loggers
Applicable to compact temperature and humidity loggers, small wireless sensors, door/window contacts, and embedded monitoring devices designed around long standby periods.
Dive Computers & Compact Instruments
Can be used in selected dive computers, electronic watches, and compact instruments that require a small primary lithium power source with long storage and standby characteristics.
Key Characteristics
- Li-MnO₂ primary lithium chemistry
- Nominal voltage: 3.0V
- Approximate dimensions: 14 × 25 mm
- Compact 1/2AA cylindrical format
- Suitable for very low continuous current
- Supports occasional light pulse loads
- Long shelf-life characteristics
- Well suited to memory backup and standby circuits
- Appropriate for space-limited electronic designs
Matching CR14250 to the Device Load
CR1/2AA should be selected according to the actual electrical profile of the equipment, particularly when the device includes both continuous standby consumption and intermittent active functions.
For OEM evaluation, useful parameters include standby current, pulse current, pulse duration, operating voltage, cutoff voltage, storage period, expected service life, operating temperature, and available battery space.
These inputs help determine whether CR14250 provides the right balance between compact size and long-term energy availability for the intended product.