t5 Battery Equivalent

Battery technology has come a long way in recent years, providing reliable and sustainable power solutions for various devices and applications. One such battery type, the T5 battery, is commonly used in various devices such as watches, calculators, remote controls, and various electronic gadgets.

However, there may be instances when the T5 battery is not readily available, requiring users to find suitable alternatives.

In this article, we will explore some of the most common T5 battery equivalents and their respective characteristics, ensuring you can keep your devices powered even in a pinch.

T5 battery

Understanding T5 Batteries

Before diving into T5 battery alternatives, it’s essential to understand the T5 battery’s specifications. This coin cell battery is a non-rechargeable, lithium-based battery with a 3V voltage output. It has a diameter of 5.8mm and a height of 1.6mm, with a capacity of approximately 25mAh. The most common T5 battery models include the CR1620, BR1620, and CR1616.

History of the T5 Battery

The T5 battery, commonly known as a coin cell or button battery due to its compact and flat circular shape, is a popular type of battery used in a plethora of small electronic devices. Its history can be traced back to the development of miniature batteries in the 20th century when there was a growing demand for smaller power sources for emerging portable electronic devices.

The ‘T’ in its name generally indicates its use as a ‘Tiny’ or ‘Thin’ power source. Over the years, the T5 battery, like other coin cell variants, has been manufactured primarily using lithium, which offers high energy density and long shelf life. Such batteries have found their place in devices like wristwatches, calculators, hearing aids, and small remote controls, among others. As electronics have miniaturized and the demand for compact power solutions has grown, the prominence of the T5 and its counterparts has only increased.

T5 Battery Equivalents

  1. CR1620: This is the most common T5 battery equivalent, offering the same dimensions, capacity, and voltage output as the original T5 battery. The CR1620 is a lithium-based battery that can be easily found in many stores and online retailers. It is compatible with a wide range of devices, making it a reliable substitute for the T5 battery.
  2. BR1620: The BR1620 is another T5 battery equivalent with a slightly different chemical composition. Instead of using lithium manganese dioxide, the BR1620 uses lithium carbon monofluoride, providing a longer shelf life and more stable voltage output. Although not as widely available as the CR1620, the BR1620 can still be found in specialty battery stores and online retailers.
  3. CR1616: The CR1616 is a slightly thinner alternative to the T5 battery, with a height of 1.6mm instead of 2.0mm. Despite the difference in size, the CR1616 can still be used as a substitute for the T5 battery in most devices, albeit with a slightly lower capacity of around 20mAh. This battery is also readily available in stores and online.
  4. CR1632: While slightly larger in diameter (16mm) and height (3.2mm) than the T5 battery, the CR1632 can still be used as an alternative in some devices. With a higher capacity of around 30mAh, the CR1632 offers longer battery life but may not fit all devices designed for the T5 battery. It is crucial to check your device’s compatibility with this battery before purchasing.
  5. LIR1620: The LIR1620 is a rechargeable lithium-ion alternative to the T5 battery, offering the same dimensions and voltage output. With a capacity of around 15mAh, this battery provides less power than the original T5 battery but can be recharged multiple times, making it a more environmentally friendly option. LIR1620 batteries are available in specialty battery stores and online retailers.


T5 Battery FAQs

  1. What is a T5 battery? A T5 battery is a coin cell, non-rechargeable lithium battery with a 3V voltage output, commonly used in small electronic devices such as watches, calculators, and remote controls. It has a diameter of 5.8mm and a height of 1.6mm, with a capacity of approximately 25mAh.
  2. What is a T5 group size? The term “T5 group size” does not refer to battery size, as the T5 designation specifically applies to coin cell batteries. In the context of automotive batteries, group sizes are used to categorize batteries by their physical dimensions, terminal types, and power capacities. The T5 label is not used in automotive battery group sizing.
  3. What does Group 51 battery mean? A Group 51 battery is a specific size and type of automotive battery with dimensions of approximately 9.4 inches in length, 5.1 inches in width, and 8.6 inches in height. This group size is common in compact cars and ensures proper fit and compatibility with the vehicle’s battery tray and electrical system.
  4. What size is a T4 battery? There is no standardized T4 battery size in the coin cell or automotive battery categories. The “T” designation typically refers to coin cell batteries, such as the T5, but there is no widely recognized T4 battery type.
  5. How do you jumpstart a T5? As a coin cell battery, a T5 battery is not designed to be jumpstarted like an automotive battery. Jumpstarting is a procedure for recharging a dead car battery using another vehicle’s battery or a portable jump starter. T5 batteries are non-rechargeable, and attempting to jumpstart a T5 battery could cause damage or pose safety risks.
  6. How long does it take to charge a T5? T5 batteries are non-rechargeable lithium batteries and cannot be charged. Once depleted, they must be replaced with a new battery.
  7. Is T3 and T5 the same? No, T3 and T5 are not the same. These designations refer to different battery types and sizes within the coin cell battery category. It is important to ensure compatibility with your device before substituting one battery type for another.
  8. What is the difference between a T5 and a T4? There is no widely recognized T4 battery type. The T5 battery is a specific coin cell battery size, as described earlier in this response.
  9. What does T and C mean on a battery? In the context of coin cell batteries, the “T” designation typically refers to a specific battery size, such as the T5 battery. The “C” designation on a battery usually refers to its capacity, which is measured in milliampere-hours (mAh). For example, a battery labeled “500C” would have a 500mAh capacity.
  10. Can I put a different group size battery in my car? It is possible to use a different group size battery in your car, but it is not always recommended. A different group size may have different physical dimensions, terminal types, and power capacities, which could lead to compatibility issues with your vehicle’s battery tray, electrical system, or both. It is best to consult your vehicle’s owner manual or consult a professional mechanic to ensure proper fit and compatibility when selecting a battery for your car.



When the T5 battery is not available, it is essential to know its common equivalents to keep your devices powered. By understanding the specifications of the T5 battery and its alternatives, you can make an informed decision and select the most suitable replacement option. Always ensure that the chosen battery is compatible with your device and be mindful of any possible size or capacity differences. With the right T5 battery equivalent, you can ensure that your devices continue to function reliably and effectively.