AG13 and LR44 batteries are often thought to be interchangeable. However, when dealing with sensitive electronic devices, it’s crucial to confirm the exact battery type required to ensure optimal performance.
What Is an AG13 Battery?
The AG13 is a compact, multi-purpose 1.5V button cell battery, commonly used in small electronic devices. Measuring 11.6 mm in diameter and 5.4 mm in thickness, it typically offers a capacity of around 138 mAh.
Though most AG13 batteries use alkaline chemistry, some variants employ silver oxide. These batteries usually consist of:
- Positive electrode: Manganese dioxide or silver oxide
- Negative electrode: Zinc
- Electrolyte: A solution that may contain sodium hydroxide or silver chloride
Due to their small size and dependable output, AG13 batteries are ideal for devices such as watches, calculators, toys, LED torches, remote controls, and some medical equipment like thermometers.
AG13 is also compatible with equivalents including LR44 (alkaline), SR44 (silver oxide, 1.55V), 357A, and A76. Suppliers such as Ersa Electronics offer a wide range of battery models to suit consumer needs, including the AG13, LR44, LR41, and 18650.
Key Features of the AG13 Battery
Type and Chemistry
Primarily, the AG13 is an alkaline manganese button cell, commonly designated as LR44. Its chemical makeup typically includes zinc and manganese dioxide.
Voltage Output
It delivers a nominal voltage of 1.5V, making it well-suited for low-power devices.
Dimensions
The battery is approximately 11.4 mm in diameter and 5.8 mm thick, perfect for compact electronics.
Capacity and Current
The AG13 offers a continuous current of around 20 mA, sufficient for most small applications.
Temperature Range
It functions effectively within a range of -20°C to 60°C, allowing it to perform in various conditions.
Shelf Life
When stored correctly, AG13 batteries maintain functionality for several years. However, it is advisable to remove them from devices if not in use for extended periods.
Typical Applications
- Watches
- Calculators
- Laser pointers
- Toys
- Remote controls
Equivalent Models
You can substitute AG13 batteries with models such as LR44, SR44, 357A, and A76 without performance issues.
Environmental Considerations
These batteries contain potentially harmful substances, so proper disposal or recycling is essential to minimise environmental harm.
Common Applications of AG13 Batteries
AG13 batteries, also referred to as LR44 or A76, are a popular choice across many industries due to their size and reliability.
Everyday Devices
- Watches: Powers both analogue and digital types reliably
- Calculators: Ensures portable, long-lasting performance
- Remote Controls: Used in remotes for TVs, speakers, and more
Gadgets and Toys
- Toys: Found in electronic games and novelty items
- Key Fobs: Common in car keys and security systems
- Medical Devices: Powers devices like thermometers, glucose meters, and heart rate monitors
Lighting and Photography
- LED Torches: Compact flashlights and novelty lights
- Cameras: Supports flash functions and metering systems
Other Uses
- Hearing Aids
- Digital Thermometers
- Backup Power for Memory Systems
- Kitchen Timers and Scales
AG13 Battery Equivalents
Several batteries share the same dimensions and voltage as the AG13, offering flexible replacement options.
Equivalent Battery Types
- LR44 – Standard alkaline version of AG13
- A76 – Marketed by Duracell, identical in specs
- 357 – Similar in size and voltage; may have varied performance
- 76A – Equivalent and widely used
- L1154 – Matches AG13 in specifications
- SR44 – Silver oxide variant with 1.55V output
- G13 and 303 – Suitable substitutes in compatible devices
When selecting an alternative, ensure the chemistry and voltage meet your device’s needs.
LR44 vs AG13 Battery
Interchangeability
LR44 is the most common alternative to AG13. They share:
- Size: Identical physical dimensions
- Voltage: Both output 1.5 volts
- Application: Found in similar devices like toys, watches, and remote controls
Performance
While both batteries have similar capacity (typically 120–150 mAh), the LR44’s performance may vary depending on the manufacturer. Silver oxide alternatives like the 357 may outperform alkaline versions in high-drain scenarios.
In essence, LR44 and AG13 are interchangeable, and users can confidently use either depending on availability.
SR44 vs AG13 Battery
Physical Compatibility
Both SR44 and AG13 share the same dimensions, making them interchangeable in many devices.
Voltage and Chemistry Differences
-
SR44: Silver oxide, 1.55V
-
AG13: Alkaline, 1.5V
While the voltage difference seems minimal, it can impact sensitive electronics that require precision. Silver oxide batteries also offer better longevity and stability, making them ideal for medical devices and professional cameras.
Choosing the Right Option
Always refer to your device’s manual. While many gadgets accept both, those requiring steady voltage may benefit more from an SR44.
Benefits of Using AG13 Batteries
Compact and Lightweight
The AG13’s small form factor makes it suitable for space-limited gadgets.
Dependable Power
With a steady 1.5V output, AG13 ensures reliable operation in precision devices.
Long Shelf Life
Proper storage allows AG13 batteries to last years without degrading.
Readily Available
Produced by major brands like Duracell and Energizer, they are easy to source.
Cost-Effective
Compared to silver oxide types, AG13 offers solid performance at a lower cost.
Interchangeability
Their compatibility with various equivalents adds to their flexibility and convenience.
Versatility
From watches to remote controls, AG13 powers a wide range of devices.
Reasonable Current Output
Capable of delivering up to 20 mA continuously, suitable for most small electronics.
Eco-Conscious Options
Manufacturers are moving towards safer, recyclable versions to reduce environmental harm.
Built-In Safety Features
Designed to prevent overheating and leaks, ensuring safe everyday use.
Are AG13 and LR44 Batteries the Same?
Yes—AG13 and LR44 are generally the same. Both share:
- Size: 11.6 mm diameter, 5.4 mm thickness
- Voltage: 1.5V
- Usage: Watches, toys, calculators, and more
Note: While chemically similar, some AG13 models may be silver oxide-based. Always check manufacturer specifications if performance is a critical factor.
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