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Views: 0 Author: Site Editor Publish Time: 2026-06-16 Origin: Site
Miniature coin cells are essential power supplies for countless slim low-current electronic gadgets. Among all ultra-thin 3V primary batteries, the CR1025 lithium manganese dioxide coin cell stands out for its tiny thickness, steady output voltage and outstanding shelf performance. This article delivers an in-depth breakdown of the CR1025 battery, covering its physical dimensions, rated capacity, unique discharge properties, applicable devices, equivalent alternatives and critical operating reminders to help engineers, purchasers and end users make proper selections.
The naming rule of CR series coin cells directly reflects their physical size. For CR1025:
The first two digits “10” refer to a nominal diameter of 10 mm
The last two digits “25” represent a nominal thickness of 2.5 mm
This ultra-thin form factor differentiates CR1025 from thicker mainstream coin cells like CR2025 or CR2032. Its slim profile fits compact, thin equipment housings where thicker batteries cannot be installed.
Standard dimensional tolerance for industrial-grade CR1025: diameter ±0.2 mm, thickness ±0.1 mm, to guarantee universal compatibility with standard battery holders.
CR1025 is a disposable primary lithium manganese battery with standardized electrical indicators under industry standard test conditions:
Nominal open-circuit voltage: 3.0 V
Typical nominal capacity: 30 mAh (tested at constant discharge current 0.1 mA, cut-off voltage 2.0 V)
Internal resistance: Medium-low, suitable for micro-current intermittent discharge
Self-discharge rate: Less than 1% per year under room-temperature sealed storage
Shelf life: Up to 5 years when stored at 20–25°C dry environment
Operating temperature range: -20°C ~ +60°C
Due to its limited internal volume, CR1025 carries a smaller capacity compared to larger-size CR coin cells. It is not designed for high-current continuous loads, but performs perfectly in long-term low-power standby scenarios.
The most prominent merit of CR1025 is its stable voltage plateau. During most of the discharge cycle, the output voltage stays steadily between 2.7 V and 3.0 V, with no sharp voltage drop. Precision sensors, timing modules and signal detectors rely on this consistent voltage to maintain accurate readings without calibration drift.
When remaining capacity runs out, the voltage gradually declines to the 2.0 V cut-off point, clearly reminding users to replace the battery.
CR1025 is optimized for pulse and tiny continuous current loads (0.01 mA to 0.5 mA). It works reliably for devices that only consume power occasionally, such as wake-up sensors, timing chips and miniature indicator lights.
If applied to high-drain products requiring constant large current, the battery voltage will drop rapidly, and its total available capacity will shrink significantly. Heavy continuous loads may also trigger abnormal heating and shorten service life drastically.
Within -20°C to +60°C, CR1025 retains over 85% of its rated capacity. At low temperatures, its discharge performance outperforms silver oxide 1.5V button cells, making it ideal for outdoor portable gadgets and vehicle-mounted auxiliary sensors exposed to cold ambient conditions.
Lithium manganese chemical system brings ultra-low self-discharge. Even after three years of storage, CR1025 still reserves most of its original capacity. This advantage lowers after-sales failure risks for mass-produced finished goods that need long-term stock storage before sale.
Combining its slim size and low-current discharge features, CR1025 is widely adopted in these categories:
Mini portable consumer electronics: Mini electronic compass, slim digital thermometer, tiny keychain laser pointer, ultra-thin mini calculator
Light wearable sports gear: Ultra-slim pedometer, calorie counter, lightweight watch accessory
Automotive auxiliary components: Small remote control auxiliary chips, miniature tire pressure backup sensors
Precision industrial & medical equipment: Portable blood glucose test auxiliary modules, micro signal transmitters, timing backup power for precision instruments
Smart home accessories: Mini induction alarm sensors, thin electronic lock sensing modules
BR1025: Same dimension and 3V voltage; better high-temperature resistance, preferred for automotive and industrial high-temperature working environments
DL1025: Universal cross-brand replacement model, identical size, voltage and capacity for daily consumer electronics
ECR1025: Enhanced industrial version with optimized discharge stability for high-precision measuring devices
LIR1025 shares the same 10×2.5 mm outline dimension, yet its nominal charging voltage reaches 3.7 V. Direct substitution into standard CR1025 devices will overvoltage internal circuits and burn out precision chips. It can only be used in special equipment with dedicated charging circuits supporting 3.7V lithium-ion cells.
CR1025 is a non-rechargeable primary battery. Charging strictly prohibited, which may cause swelling, electrolyte leakage or fire hazards.
Install following positive and negative polarity marks in battery slots; reversed placement leads to equipment malfunction.
Store spare batteries in cool, dry places, separated from metal objects to avoid short-circuit.
Replace batteries timely once equipment response slows down or indicator flickers, to prevent electrolyte corrosion inside devices from over-discharged dead batteries.
Do not mix CR1025 with different-size, different-voltage batteries in one device.
As a classic ultra-thin 3V lithium manganese coin cell, CR1025 features compact 10 mm × 2.5 mm dimensions, stable 30 mAh capacity and an excellent flat discharge voltage platform. Its micro-current optimized discharge characteristics and ultra-low self-discharge rate make it the top power choice for slim miniature low-power electronics. When selecting replacement batteries, pick CR1025, BR1025 or DL1025 according to working temperature and precision requirements, and avoid improper use of rechargeable LIR1025 to protect electronic devices and extend battery service lifespan.
