CR batteries are lithium manganese dioxide (LiMnO₂) non-rechargeable cells identified by standardized codes denoting size. The “CR” prefix distinguishes them from alkaline (LR) or silver oxide (SR) counterparts. Key variants include CR2032 (20mm diameter, 3.2mm thick), CR2025 (2.5mm thick), CR2450 (24mm diameter, 5mm thick), and CR2016 (1.6mm thick), with capacities ranging from 70mAh to 600mAh. These 3V batteries excel in low-drain applications like key fobs, watches, and medical devices, offering stable voltage output and 5–10-year shelf lives. Their compact design ensures reliable performance in temperature-sensitive environments.
How Much Does It Cost To Replace All The Batteries In A Golf Cart?
Wholesale lithium golf cart batteries with 10-year life? Check here.
How are CR battery codes structured?
The four-digit code after “CR” specifies physical dimensions: first two digits represent diameter in millimeters (e.g., “20” in CR2032 = 20mm), while last two digits indicate thickness in 0.1mm units (e.g., “32” = 3.2mm). This standardization allows quick identification of compatible replacements across brands and ensures cross-industry compatibility for devices requiring precise battery sizing.
Imagine needing a battery for a car key fob: a CR2032’s 3.2mm thickness fits snugly into compartments designed for that specific profile, while a thicker CR2450 would physically jam the slot. Pro Tip: Always verify device specifications—using a CR2025 (2.5mm thick) instead of CR2032 risks intermittent contact despite identical diameters. Some manufacturers use alternate codes (e.g., DL2032), but these follow the same dimensional rules. Transitioning to real-world applications, consider how the CR2450’s higher capacity supports power-hungry devices like tire pressure sensors.
| Code | Diameter | Thickness |
|---|---|---|
| CR2016 | 20mm | 1.6mm |
| CR2032 | 20mm | 3.2mm |
| CR2450 | 24.5mm | 5.0mm |
What capacity differences exist between CR types?
Capacity scales with cell volume: thicker and larger-diameter CR batteries store more energy. CR2016 holds ~70mAh, CR2032 exceeds 200mAh, while CR2450 delivers 600mAh. These variations directly correlate to runtime—a glucose monitor using CR2032 lasts 3× longer than with CR2016 despite identical 3V outputs.
But why doesn’t voltage drop proportionally? Lithium manganese dioxide chemistry maintains stable 3V output until 80% discharge, after which voltage plummets rapidly. For instance, a CR2032 powers a computer motherboard’s CMOS for 5–7 years, while slimmer CR2025 cells in car remotes may need replacement every 2–3 years. Pro Tip: For continuous 0.2mA draws, prioritize CR2450 over CR2032 to avoid frequent replacements. Transitionally, higher capacities enable CR2450’s use in IoT sensors requiring multi-year operation.
Want OEM lithium forklift batteries at wholesale prices? Check here.
| Type | Capacity | Typical Use |
|---|---|---|
| CR2016 | 70mAh | Low-drain remotes |
| CR2032 | 230mAh | Watches, medical devices |
| CR2450 | 600mAh | Industrial sensors |
Why choose CR over other lithium batteries?
CR cells outperform alkaline and silver oxide in shelf life and temperature resilience. Unlike rechargeable Li-ion, CR batteries maintain 3V without voltage regulators, simplifying device design. Their hermetic sealing prevents leakage—critical for implanted medical devices—and they operate reliably from -30°C to 85°C, making them ideal for automotive and outdoor applications.
Consider a garage door opener exposed to freezing winters: CR2032’s cold-weather performance ensures consistent operation, whereas alkaline cells might fail. Pro Tip: Avoid stacking CR cells for higher voltage—uneven discharge risks reverse polarity damage. Transitioning further, their 10-year shelf life makes CR batteries perfect for emergency exit signs or infrequently used equipment.
How do CR batteries compare to BR types?
BR batteries (e.g., BR2032) use carbon monofluoride chemistry for higher temperature tolerance (up to 125°C vs. CR’s 85°C limit). However, CR cells provide 10–20% higher capacity at room temperature. BR types excel in automotive under-hood applications, while CR dominates consumer electronics due to cost-efficiency.
A car’s tire pressure monitoring system might use BR batteries for heat resistance, whereas a wristwatch uses CR2032 for optimal capacity. Pro Tip: Never substitute BR for CR in high-drain devices—their lower pulse current capacity may cause premature failure.
What devices commonly use CR batteries?
CR2032 powers motherboard BIOS, calculators, and fitness trackers. Slimmer CR2025 fits into Bluetooth trackers, while CR2450 energizes GPS loggers and digital thermometers. Medical applications include hearing aids and glucose monitors, where reliable voltage is non-negotiable. Even some e-cigarettes use CR123A cylindrical variants for high-drain capabilities.
Why don’t smartwatches use CR batteries? Modern wearables require rechargeability, but hybrid devices like hybrid smartwatches combine CR cells for always-on displays. Pro Tip: For devices with intermittent use (e.g., luggage trackers), CR2032’s low self-discharge beats Li-ion alternatives.
Redway Battery Expert Insight
FAQs
Can CR2032 replace CR2025 batteries?
Only if thickness (3.2mm vs. 2.5mm) doesn’t compromise device closure. While voltage matches, forced installation risks damaging contacts.
Are CR batteries recyclable?
Yes—but require specialized facilities. Never dispose in household trash due to lithium content; use designated battery recycling points.
Why do CR batteries last so long?
Lithium manganese dioxide’s low self-discharge (2% annually) preserves capacity. Sealed construction prevents electrolyte evaporation, unlike alkaline cells.
What do the sizes of CR batteries mean?
The size of a CR battery is indicated by a code, such as CR2032. The first two digits represent the diameter in millimeters, and the last two digits indicate the thickness or height in tenths of a millimeter. For example, CR2032 means 20 mm diameter and 3.2 mm thickness.
What size is a CR battery?
CR batteries vary in size; for instance, a CR2032 has a diameter of 20 mm and a thickness of 3.2 mm. Other common sizes include CR2025 (20 mm diameter, 2.5 mm thick) and CR2016 (20 mm diameter, 1.6 mm thick). Sizes are standardized for mechanical interchangeability.
Are CR2025 and CR2032 batteries the same?
No, CR2025 and CR2032 batteries have the same diameter (20 mm) but differ in thickness: CR2025 is 2.5 mm thick, and CR2032 is 3.2 mm thick. This difference affects capacity and how long the battery lasts.
What does the CR mean on a battery?
CR refers to a type of lithium manganese dioxide coin battery following IEC standards. “C” stands for lithium chemistry, and “R” means round or cylindrical shape. These batteries typically deliver 3 volts with stable performance in small electronics.
What Is A Comprehensive Battery Size Chart?
A comprehensive battery size chart lists various battery models with their physical dimensions (diameter, length, or thickness), voltage, capacity, and common applications, helping users identify the proper size and type for their device.
Where Can I Find A Button Battery Sizes Chart?
Button battery size charts are available on battery manufacturer websites, electronics retailers, and through downloadable PDFs from specialized battery suppliers or OEM manufacturers like Redway Battery.
What Are The Standard Coin Battery Sizes?
Standard coin battery sizes include CR1025, CR1216, CR1616, CR1620, CR1632, CR2016, CR2025, CR2032, CR2430, among others. Sizes specify diameter and thickness in millimeters, commonly used in watches, remote controls, calculators, and medical devices.
Where To Download Button Battery Sizes Chart PDF?
You can download button battery size charts in PDF format from official battery supplier websites, electronics component distributors, or industry-standard organizations like IEC or ISO that publish standardized battery specifications.
What Are Common Battery Sizes With Pictures?
Common battery sizes include AA, AAA, C, D, 9V, and coin cells like CR2032, CR2025, with pictorial charts available on battery retailer sites and manufacturer catalogs for easy visual identification.
What Are The Specs Of Button Battery CR2032?
The CR2032 is a lithium coin battery with 20 mm diameter, 3.2 mm thickness, nominal voltage of 3 volts, and capacity around 210-240 mAh. It is widely used in watches, fitness devices, computer motherboards, and car key remotes.
How Do I Know My Correct Car Battery Size?
Check your vehicle’s owner manual or existing battery label for the group size (e.g., Group 24, 27). Also measure the battery’s physical dimensions and terminal type to ensure proper fit and compatibility.
What Is A D Battery And Where Is It Used?
A D battery is a large cylindrical battery, typically 1.5 volts, used in high-drain devices like flashlights, portable radios, and large toys. It offers long runtime due to its larger size and capacity.
