AG13, SG13, LR1154, SR44, 303, 357, A76, LR44 Battery Equivalents
AG13/LR44/SR44/357 button/coin cell batteries are very popular batteries, commonly found in wrist watches, small flashlights, calculators, some remote control devices and other small electronic units.
According to the IEC standard, this battery should be called LR1154 (alkaline) or SR1154 (silver-oxide). Sometimes shorter, two-digit code is used: LR44 for alkaline and SR44 for silver-oxide batteries.
Many manufacturers use their own names for these batteries, but they also tend to add IEC and other standard codes, including short descriptions about the chemistry and other important features.
LR1154 (alkaline) or SR1154 (silver-oxide) are button/coin cell batteries 11.6 mm in diameter and 5.4 mm in height. Their capacity depends on the used chemistry, but also a cut-off voltage of the used device.
- AG13 vs SG13: AG13 should be 'alkaline G13' and SG13 should be 'silver-oxide G13' battery. However, sometimes manufacturers mark silver-oxide batteries with both SG13 (correct) and AG13 (no so correct) to emphasize that their battery is replacement for AG13/LR44/LR1154 battery.
- if the battery code starts with the 'L', than it is 'most probably' alkaline coin cell.
- if the battery code starts with the 'S', than it is 'silver-oxide' coin cell.
- if the battery code starts with the 'P', than it is 'zinc-air' coin cell.
- if the battery code starts with the 'M' or 'N', than it is 'mercury-oxide' coin cell. However, due to the presence of the mercury, these batteries are no longer in use.
- if the battery code after the digits contains 'P', then it is the battery with potassium hydroxide electrolyte.
- if the battery code after the digits contains 'S', then it is the battery with sodium hydroxide electrolyte.
- if the battery code after the digits doesn't contain 'P' or 'S', then most probably that battery contains organic electrolyte.
- if the battery code after the digits contains 'W', then the battery complies with the IEC 60086-3 watch batteries standard.
Comparison and examples of LR44/SR44/AG13/SG13 batteries are given in the following table.
AG13/LR44/SR44/357 Batteries Comparison Chart
|Notes||Voltage drops over time||Very constant voltage||Slightly lower voltage, large capacity;
mostly used as hearing aid batteries
|Slightly lower voltage, contains mercury;
not in use anymore
|Typical Labels||LR44, 76A, AG13, LR1154, A76||SR44W, SR44, 157, 357, 303, SG13, AG13, S76, A76, SR1154||675, Blue Tab, ZA675, PR44, 7003ZD||MR44, MR1154|
|Typical Capacity||110-130 mAh||150-200 mAh||600-700 mAh||180-200 mAh|
|Amazon Link||LR44 AG13 Battery||SR44 357 Battery||PR44 Battery||No longer in use.|
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Common AG13/LR44/SR44/357 Chemistries
Mercury-oxide batteries are no longer in use due to the mercury content, which is not the most environment friendly metal - to say the least.
Zinc-air batteries have slightly lower voltage (1.4 V vs 1.5 V) when compared with alkaline batteries, but they have rather large capacity of 600-700 mAh.
These batteries use oxygen from the air and wet electrolyte - prior the use, tab is removed and the air enters the battery. However, when electrolyte dries out, battery is dead even if it hasn't been depleted by the use.
Price of the battery is acceptable and not being higher than the price of other LR44/SR44 batteries.
Silver-oxide batteries have slightly higher nominal voltage (1.55 V vs 1.5 V) when compared with alkaline batteries, but unlike alkaline batteries this voltage remains fairly constant during use, with cut-off voltage around 1.2V. Also, silver-oxide batteries have larger capacity when compared with alkaline batteries.
These batteries are preferred choice for powering watches, calculators, and similar small electronic devices. Such devices can have reliability issues when being powered by alkaline batteries due to the voltage drop.
Silver-oxide batteries cost slightly more than alkaline batteries, but their features and performances IMHO justify the price difference. When buying larger packages, price difference is usually negligible.
Alkaline batteries are on the market for a long time - they are cheap and reliable and have decent capacity of 110-130 mAh. Since their voltage drops during the use, their capacity depends on the cut-off voltage of the used device - if it is some digital watch that signals at 1.2V battery voltage that it is time to change the battery, then these batteries are not recommended for such devices.
But, for general use in toys, small flashlights and similar applications, they are good to go.
Long Story Short: if you are unsure which AG13/LR44/SR44/357 battery to buy, go for reliable silver-oxide SR44/357 battery from reputable seller, even if it means paying slightly more.
If you need a battery for hearing aid, good 675/P44 battery from a good company will be just fine.