An AG13 battery is a small, 1.5-volt alkaline zinc-manganese dioxide button cell battery. It is commonly known by several equivalent names, including LR44, A76, and 357, and measures 11.6mm in diameter and 5.4mm in height.
What is an ag13 battery?
The AG13 is a compact, cylindrical button cell that uses alkaline zinc-manganese dioxide chemistry to deliver a nominal voltage of 1.5 volts. Its physical dimensions are 11.6mm in diameter and 5.4mm in height, making it a standard size for a wide range of small electronics. The AG13 name derives from 'A' for alkaline and 'G' for the mercury content used in earlier versions. Because of its widespread use, it is sold under multiple equivalent designations, including LR44, A76, and 357. When you need to understand what is a ag13 battery, knowing these interchangeable names helps you find the correct replacement for your device regardless of the label on the package.
AG13 vs silver oxide batteries: a key difference
The most critical practical distinction is between the alkaline AG13 and silver oxide equivalents like SR44 or 357. While both share the same physical dimensions, silver oxide batteries offer a slightly higher nominal voltage of 1.55V and provide a much more stable voltage output throughout their entire lifespan. This stable discharge curve is why silver oxide batteries are preferred for precision instruments and medical equipment where consistent power is critical. In contrast, the alkaline AG13 battery is more cost-effective for general use, making it a suitable choice for low-drain devices where a gradual voltage drop is acceptable. Choosing between them comes down to whether your device needs the steady power of silver oxide or the lower cost of an alkaline cell.
Common uses for AG13 batteries
AG13 batteries are commonly used in low-drain electronic devices such as watches, calculators, toys, remote controls, LED flashlights, and various medical devices like digital thermometers and blood glucose meters. Keyless entry systems (key fobs and remote control systems for cars and home security) are a common use. Hearing aids are a common medical device use. Their compact size and reliable 1.5V output make them a standard power source for these everyday items. If you are comparing this cell to larger power sources, you can find its specifications listed alongside AA and AAA battery specs in most battery selection charts, which helps you see how it fits into the broader landscape of portable power.
AG13 battery specifications
The key technical specifications for an AG13 battery include a typical capacity ranging from approximately 110 to 190 mAh, varying by manufacturer and specific discharge conditions. The outer shell is typically made of stainless steel or nickel-plated brass. The anode is usually made of zinc, the cathode of manganese dioxide mixed with carbon powder, and the electrolyte is a gel-like substance of potassium hydroxide or sodium hydroxide. A rubber gasket seal at the top prevents leakage and acts as an insulator. It operates reliably within a temperature range of -20°C to 60°C. When stored properly, its shelf life is generally 2 to 5 years, with some brands claiming up to 10 years under ideal conditions.
Environmental safety and disposal
AG13 batteries are typically mercury-free, lead-free, and cadmium-free, complying with environmental regulations like RoHS. Despite this safer composition, they should not be thrown in regular household trash. Proper disposal requires taking used batteries to a designated recycling center or collection point that accepts hazardous materials to prevent environmental contamination.
Handling and storage tips
For optimal performance and safety, store AG13 batteries in a cool, dry place away from direct sunlight and extreme temperatures. Always keep them out of reach of children, as they pose a choking hazard if swallowed. Never mix AG13 batteries with other battery types or different brands, as different voltage levels can cause leakage or device damage. If you notice swelling, leakage, or a strange odor, do not use the battery and dispose of it safely. If a device will not be used for an extended period, remove the batteries to prevent potential leakage and damage to the equipment.
Frequently Asked Questions
How long does an AG13 battery last?
In low-drain devices like watches or calculators, an AG13 battery can last 1 to 2 years. In high-drain devices such as electronic toys, the battery may only last a few months.
Where can I buy AG13 batteries?
AG13 batteries are widely available at most electronic stores, department stores, and online marketplaces. Always purchase from a reputable seller to ensure quality and authenticity.
Can I replace an AG13 battery with a different type?
You may use an alternative battery only if it has the same voltage (1.5 volts) and the same physical dimensions as the AG13. Using an incompatible battery can cause device malfunction or damage.
What is the difference between an AG13 and an LR44?
There is no difference; AG13 and LR44 are the same battery. They are simply different naming conventions for the identical alkaline button cell.
For the wider topic, see AA and AAA battery specs.
