An LR44 battery is a small, 1.5V alkaline button cell that uses zinc/manganese dioxide chemistry. With standard dimensions of 11.6mm in diameter and 5.4mm in height, it is the correct power source for many compact electronics like calculators, watches, and toys.
What is an LR44 battery?
An LR44 is a standard-size alkaline button cell battery. It provides a nominal voltage of 1.5V and uses a zinc/manganese dioxide chemical system. The battery is a primary cell, meaning it is not rechargeable. Its compact size makes it suitable for devices where space is limited, and it is widely available as a replacement for many small gadgets. LR44 is also known as AG13, A76, and 357A.
LR44 battery specifications
Official specifications for the LR44 include the following documented characteristics:
- Nominal voltage: 1.5 V
- Chemistry: alkaline / zinc-manganese dioxide
- Size: 11.6 mm x 5.4 mm
- Capacity: documented values vary by manufacturer, including approximately 105 mAh, 115 mAh, 130 mAh, 150 mAh, 158 mAh, and 190 mAh
- Weight: approximately 1.75 g to 2.0 g
- Operating temperature: 0°C to 60°C in one manufacturer-style specification
- Internal resistance: below 20 Ω at 20°C in one specification
- Primary (non-rechargeable) status
LR44 batteries have a relatively long shelf life, making them ideal for occasional use devices that may be stored for extended periods. Many LR44 batteries come with leak-proof designs. When comparing the LR44 to AA and AAA battery specs, you will notice it is much smaller and lighter, designed specifically for low-power, compact devices rather than high-drain applications.
Common uses and applications
LR44 batteries are used in calculators, watches, toys, remote controls, and other small electronic devices. They are also found in compact consumer electronics where a small 1.5V cell is required. Typical devices include digital thermometers, keyless entry systems, laser pointers, and small LED flashlights. LR44 batteries are commonly used in hearing aids. LR44 batteries are commonly used in medical devices such as blood glucose meters, digital scales, and portable medical diagnostic tools.
How an LR44 battery works
An LR44 battery works by converting chemical energy from the alkaline zinc/manganese dioxide system into electrical energy. As the battery discharges, its voltage gradually falls, which is typical of alkaline button cells. This gradual voltage drop means the battery provides consistent power for most of its life before needing replacement.
Frequently Asked Questions
Is an LR44 rechargeable?
No, the LR44 is a primary alkaline cell and is not rechargeable. Attempting to recharge it can cause damage or create a safety risk.
What devices use LR44 batteries?
LR44 batteries are used in calculators, watches, toys, remote controls, thermometers, keyless entry systems, laser pointers, and other compact electronics that require a small 1.5V cell.
Do all LR44 batteries have the same capacity?
No, documented capacities vary by manufacturer and test method. Values ranging from about 105 mAh to 190 mAh have been reported, so it is important to match the replacement battery to your device's requirements.
How long does an LR44 battery last?
Generally, LR44 batteries have a capacity of around 150-200mAh, powering low-drain devices for several months to a year, but high-drain devices deplete power more quickly.
