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Views: 0 Author: Site Editor Publish Time: 2026-06-16 Origin: Site
The CR1025 is a widely used ultra-thin 3V coin cell for miniature low-power electronics. Many buyers and electronic engineers often confuse it with two lookalike models of identical size: BR1025 and LIR1025. Though all three share the same 10mm diameter and 2.5mm thickness, they differ drastically in chemical composition, electrical performance, working temperature, rechargeability and applicable equipment.
This article clearly sorts out the core distinctions of CR1025, BR1025 and LIR1025, summarizes their respective suitable application scenarios, and provides practical selection guidance to help you avoid wrong battery replacement and equipment damage.
All three batteries follow the same dimensional standard: 10mm (D) × 2.5mm (T), which means they fit the same battery holders mechanically. However, their core chemical systems determine completely different performance limits.
表格
Item | CR1025 | BR1025 | LIR1025 |
|---|---|---|---|
Chemistry | Lithium Manganese Dioxide (Li-MnO₂) | Lithium Carbon Monofluoride (Li-CFx) | Lithium-ion Rechargeable |
Nominal Voltage | 3.0V | 3.0V | 3.7V (full charge) |
Rechargeable | No, primary disposable | No, primary disposable | Yes, secondary rechargeable |
Typical Capacity | ~30mAh | ~28mAh | ~25mAh |
Operating Temperature | -20℃ ~ +60℃ | -40℃ ~ +125℃ | -20℃ ~ +60℃ |
Self-discharge Rate | <1% per year | Ultra-low, long storage life | Higher self-discharge |
Discharge Platform | Stable flat curve | Flatter voltage at high temperature | Voltage drops noticeably during discharge |
Temperature resistance gap
CR1025 works well in normal indoor and mild outdoor environments. Once the ambient temperature exceeds 70℃, its capacity will drop sharply.
BR1025 supports extreme high and low temperatures. It maintains stable output in vehicle engine compartments, industrial high-temperature control boards and cold outdoor monitoring equipment, making it the preferred industrial high-temperature model.
Discharge stability under continuous micro-current
CR1025 delivers better performance at room temperature with slightly higher total capacity, perfect for daily consumer electronics.
BR1025 retains consistent voltage output when discharged at tiny currents for years without obvious attenuation, ideal for long-term standby monitoring sensors.
Cost and supply
CR1025 is mass-produced with lower cost for civilian products; BR1025 adopts special fluoride raw materials, resulting in higher unit prices for industrial customized projects.
The biggest risk is voltage mismatch. LIR1025 fully charges to 3.7V, 0.7V higher than the standard 3V circuit design of CR1025 devices. Direct replacement will burn sensitive chips, sensors and timing modules.
Other key gaps:
Cycle life: LIR1025 supports hundreds of charge-discharge cycles, while CR1025 and BR1025 can never be charged.
Self-discharge: LIR1025 loses power faster during idle storage; long-term shelf products cannot use LIR1025.
Circuit requirement: LIR1025 must match a dedicated lithium charging management board, which is unnecessary for CR/BR primary batteries.
Suitable for room-temperature consumer electronics with low cost demand:
Ultra-thin mini watches, slim pedometers and calorie trackers
Mini electronic compasses, portable laser pointers, tiny keychain lights
Household digital thermometers, mini calculators
Low-cost smart door lock sensing chips, small toy timing modules
General wearable accessories without high-temperature exposure
Prioritize this model for high/low temperature industrial and automotive equipment requiring long standby:
Automotive tire pressure monitoring backup sensors, car remote auxiliary chips
Outdoor environmental micro-signal transmitters, cold-area monitoring modules
Industrial precision instrument clock backup power, high-temperature control panel memory batteries
Medical portable detectors that work in variable temperature environments
Equipment that needs 3–5 years of uninterrupted standby without battery replacement
Only for equipment with built-in dedicated 3.7V charging circuits:
Rechargeable mini Bluetooth trackers
Customized rechargeable wearable tags with USB charging function
Small wireless signal repeaters with cyclic power supply demand
Note: Never install LIR1025 into standard CR1025 devices without charging management circuits.
Do not use LIR1025 to replace CR1025 or BR1025 in regular 3V gadgets; overvoltage will permanently damage circuit boards.
Never attempt to charge CR1025 and BR1025 primary batteries. Charging may cause swelling, electrolyte leakage or safety risks.
For automotive and outdoor industrial projects, avoid CR1025 and select BR1025 to prevent capacity loss under extreme temperatures.
Spare batteries should be stored separately from metal conductors to avoid short-circuit, regardless of model type.
CR1025, BR1025 and LIR1025 share identical physical size but serve completely different application fields.
Choose CR1025 for ordinary consumer electronics used at room temperature for cost-effective stable power supply;
Choose BR1025 for industrial, automotive and outdoor devices with wide temperature and long standby requirements;
Choose LIR1025 only if your product has a matched 3.7V lithium charging circuit for cyclic recharge use.
Mastering the differences between these three models allows accurate battery selection, extends electronic equipment service life and effectively avoids product failure caused by mismatched power sources.
