LR44/AG13/L1154 battery is a small primary (non-rechargeable) button cell battery commonly found in LED flashlights, digital thermometers, watches, clocks, toys, calculators, remote controls and similar. Some vacuum cleaners use these batteries as motherboard batteries.

 

LR44/AG13/L1154 battery is a small primary (non-rechargeable) button cell battery commonly found in  LED flashlights, digital thermometers, watches, clocks, toys, calculators, remote controls and similar. Some vacuum cleaners use these batteries as motherboard batteries.

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According to the IEC standard 60086-3, R44 battery is a round cell 11.6 mm in diameter and 5.4 mm in height.

The letter L in LR44, defines the chemistry type of the batter – a zinc negative electrode, manganese dioxide positive electrode and an alkaline electrolyte. R44 batteries come in other chemistries, too, with specificiations given in the following table.

R44 Alkaline, Silver Oxide, Zinc Air and Mercury Oxide Batteries Comparison

Chemistry Alkaline Silver Oxide Zinc Air Mercury Oxide
Common Name LR44, LR1154, L1154 SR1154, SR44, SR44SW PR44, PR675 MR1154, MR44
Typical Capacity 100-120 mAh 200 mAh 600-650 mAh 200 mAh
Nominal Voltage 1.5 V 1.55 V 1.4V 1.35V
Note Typical LR44 battery Slightly higher voltage Slightly lower voltage, much higher capacilty Contains mercury, withdrawn.

LR44 primary alkaline button cell battery is a typical R44 battery. It is 11.6 mm in diameter, 5.4 mm in height and weighs around 1.7-1.8 grams. Capacity of LR44 batteries depends on discharging conditions, but when discharged over ~8k? resistor, from 1.5V down to 0.9V at room temperature of 20°C, their typical capacity is around 100-120 mAh – it takes about 675 – 700 hours (almost a month) to fully discharge LR44 at this rate. Note that voltage in alkaline batteries decreases with battery life.Self discharge rate of LR44 battery is at most 10% per year – one of the reasons why they are also used as motherboard batteries, although CR2032 battery is more often used as such.

Silver oxide R44 battery costs more than alkaline LR44, it has slightly higher voltage and almost double the capacity. Since voltage is slightly higher, sensitive equipment designed for use of silver oxide batteries can have issues when ordinary LR44 batteries are used – check the manuals if your device accepts LR44 instead of SR44 and vice versa. Silver oxide batteries maintain voltage with batter life much better than alkaline batteries.

Zinc air R44 battery costs more than alkaline LR44, it has somewhat lower voltage, but much higher capacity. PR44 (zinc air R44) are mostly used in hearing aid devices and they use moist electrolyte and air for operation – if electrolyte dries out before they are fully discharged, they stop to operate.

Mercury oxide batteries contain mercury (hence the name) and are withdrawn from the market – they had slightly lower voltage than alkaline batteries, but almost double the capacity – similar to the silver oxide batteries.

LR44 Battery Equivalents and Replacements

Manufacturers often have their own designations for LR44 batteries, for example: LR44, LR44G, LR44GD, LR44H, LR1154, L1154, L1154C, L1154F, L1154G, L1154H, 6135011748057, 1166A, AG13, A613, AG14, AG-14, G13A, G13-A, 157, 303, 357, A76, AG76, GDA76, GP76A, GPA7, GPA75, GPA76, GPS76A, 1128MP, 208-904, A-76, A76, CA18, CA19, CR44, D76A, KA, KA76, MS76H, PX76A, PX675A, RPX675, RW82, SB-F9, V13GA, etc. Fortunately, most of them also use standard name for these batteries – ‘LR44 battery’.

Common manufacturer’s designations for silver oxide R44 size button cell batteries are: SR44, SR44W, SR44SW, 6135996513240, SR1154, 1107SO, 1131SOP, SG13, S76, EPX76, 303, 357, D357H, V357, etc.

Common zinc air R44 designations are: HZA675, ZA675, KX675, NP675, P13, Size 13, etc.

Most popular R44 alkaline and silver oxide batteries are given in the following table:

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Of course, there are many other R44 batteries on the market, and the table contains only the most popular models with the best ratings.

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