The BR2325 is the wide-temperature version of the CR2325: 3 volts, 23 mm by 2.5 mm, about 165 mAh of carbon monofluoride chemistry. It survives roughly -30 to +80 degrees C and holds its charge for well over a decade in standby service.
BR2325, face and side profile, drawn to scale: 23 mm across, 2.5 mm thick.
Voltage
3 V
Size (D×H)
23 × 2.5 mm
Chemistry
Lithium carbon monofluoride (Li/CFx)
Capacity
165 mAh
Compatible replacements
CR2325: Standard-chemistry twin with more capacity for indoor temperatures.
Buying and replacement notes
Industrial gear from the 1980s and 1990s leaned on this cell for CMOS and clock backup, and surviving equipment still asks for it. A CR2325 substitutes acceptably indoors. As with all BR types, its strength is endurance rather than muscle; do not expect it to drive transmitters or motors well.
⚠️ Keep away from children. Swallowed button batteries, especially 20 mm lithium coins, cause severe injury within hours. If a child swallows one, call the 24/7 National Battery Ingestion Hotline (US) at 800-498-8666 or poison control at 800-222-1222 immediately. What every parent should know.
Frequently asked questions
Can I put a CR2325 where a BR2325 was?
In climate-controlled equipment, yes; dimensions and nominal voltage match, and the CR offers slightly more capacity. Keep the BR type for anything in vehicles, plant floors or outdoors, where its temperature tolerance and slow self-discharge are the reason it was chosen.
Why does old industrial equipment specify BR2325?
Designers of long-lived controllers needed a backup cell that would still be alive after 10-plus years and tolerate uncontrolled cabinet temperatures. BR chemistry self-discharges at a fraction of the CR rate, which made it the standard for that era's memory backup.
How do I know when a backup BR2325 is failing?
Equipment losing its clock or configuration after power cycles is the classic symptom. Measure the cell: healthy BR types read close to 3.0 V. Replace preemptively during scheduled maintenance every 8 to 10 years rather than waiting for data loss.