LR621 Battery Equivalent, Features, Uses & Dimensions

The LR621 battery, or AGI battery, is a button battery with silver oxide and alkaline chemistry. The LR621 battery is mainly used for wristwatches, small toys, remote keys, and other small devices. In this post, we will cover details of LR621 battery features, working, and related factors. So let’s get started with an introduction to the LR621 battery.

Overview of LR621 battery

• The KLR621 battery, also known as AG1, is a button cell battery. These batteries provide both alkaline and silver oxide chemistries.
• Silver oxide battery has high stable voltage and longer working life than alkaline batteries.
• The dimensions for the battery are 6.8mm in diameter and 2.1mm in height. The voltage value for this battery is 1.5 volts, and the temperature range is 0 to 60 degrees, and the optimal temperature is 20 degrees.
• It is a small-size battery and part of a watch and other small devices.

 SR621 Batteries Features

The LR621 battery is a non-rechargeable button cell battery and comes with dimensions of 6.8mm in diameter and a height of 2.1mm. Its alkaline version is denoted as LR621, LR60, or AG1 batteries. The voltage for this battery is 1.5 volts, and in use, it forms voltage losses quickly.

The cut-off voltage for this battery is about 0.9 volts, and for electronic devices, devices provide certain values for cut-off voltage, such as 1.1 or 1.2 volts. If the battery reaches that voltage level, the device will shut off or show erratic behaviors. When the battery reaches this voltage, the device will either shut off or start to behave erratically.

The battery has a capacity of about 12 to 15 mAh for discharge to 0.9 volts. Normally, LR621 batteries are part of toys, flashlights, and devices where constant voltage is not the main factor.

The silver oxide batteries are classified as SR621, 164, 364, SR621SW, SR60, SG1, or AG1.

The nominal voltage for these batteries is 1.55 volts, and the cut-off voltage is 1.2 volts. If the battery is in use, voltage loses slowly and remains constant at the time of use. When a battery is completely discharged, voltage drops fast, and a battery with less than 1.2 volts is fully discharged.

• Chemistry: Alkaline or Silver Oxide
• Voltage: 1.5 volts for alkaline, 1.55 volts for silver oxide
• Diameter: 6.8 mm
• Height: 2.1 mm
•  weight: 0.28g
• End point voltage: 0.9V
• Storage humidity: 60±15% RH

364, AG1, LR621, and SR621SW Battery Features

AG1 and LR621 Compatibility

AG1 and LR621 batteries are alkaline batteries and come with the same dimensions. 6.8 mm diameter and 2.1 mm height. Their voltage is 1.5 volts. These batteries are used for low-drain devices, small toys, remote controls, and electronic devices where low power is needed.

These batteries can be replaced with each other and have low-budget options for replacing each other. They are the best option to replace each other where high voltage stability is not needed.

364/SR621SW vs. AG1/LR621 Batteries

All four batteries have the same dimensions. 6.8 mm diameter and height is 2.1 mm. We can use it as a replacement for the same device. Such as if 364 batteries are replaced with AG1 in a watch, the watch can run out of power due to high power use and need more battery replacement.

The use of silver oxide batteries, such as SR621SW, in toys that normally use LR621 batteries is not effective.

For replacement, first check device power demands. If there is a need for reliable and constant voltage, it is not important to use a silver oxide battery, and for low-demand features, the alkaline AG1 battery or LR621 is the best option.

LR621 Battery Equivalents

• LR60
• G1A
• AG1
• LR620
• 080-D29
• LR621
• LR621W

How Temperature Affects Battery Performance?

Temperature is the main factor for defining the battery working conditions and especially for comparing battery efficiency for alkaline and silver oxide in different conditions.

Temperature Sensitivity

Alkaline Batteries

Alkaline batteries like AG1 and LR621 batteries are sensitive to temperature changes. Such as if in a remote control there is an AG1 battery connected in the car at the time of cold weather, there is a chance it will affect the battery.

If there is a small toy getting power with an LR621 battery in external conditions at the time of summer, it can affect the battery’s working life and cause battery leakage.

Alkaline batteries work well in moderate indoor conditions and can provide constant power without any high-temperature effect.

Silver Oxide Batteries

The silver oxide batteries, such as 364 and SR621SW, work well in different temperature conditions. Such as if there is a wristwatch getting power with a 364 battery and used in freezing mountain temperatures, the watch will provide proper working. The medical devices that use SR621SW batteries work well in high temperatures and humid conditions and are best used in diverse environmental conditions.