The AG3 battery is a 1.5 volt alkaline button cell battery commonly used in small consumer electronics. AG3 is a common name and is identical to a LR41 battery.
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About the AG3 Battery
The AG prefix stands for the alkaline chemistry of the battery. It has a 7.9mm diameter and a 3.6mm height. The nominal voltage is 1.5 volts. Typical capacity is 35 mAh.
AG3 Specifications
| Nominal Voltage | 1.5V |
| Dimensions | 7.6mm x 3.6mm |
| Weight | 0.7 grams |
| Capacity | 35 mAh |
Equivalent Batteries
Several companies use other names that may be interchanged with AG3 batteries.
General common names: SG3, LR41, LR736, and SR736 are common compatible batteries.
Brand names: Energizer and Duracell will use names of 192, 384, or 392.
How to Get Longer Life
For electronics where you want longer life, then substitute with a silver oxide battery instead of using the alkaline version. SG3, and SR736 are such batteries with silver oxide chemistry and have a typical capacity of 45 mAh. The higher capacity equals to about 29% longer life.
Saving Money
Since button cell batteries will have the same capacity, a cheaper generic battery will perform just as well as a more expensive brand name battery. Also, you can easily find AG3 batteries sold in packs of 10 cheaper than a 2 to 3 pack of the brand names. They normally have a shelf life of 2 to 4 years.