4SR44, 4SR44, PX28L Battery Comparison, Equivalents and Alternatives

The 4SR44 or 4LR44 battery is a small cylindrical battery commonly utilized in dog collars, film cameras, miniature LED flashlights, car security systems, remote controls, toys, and more. These batteries are categorized as either 4SR44 or 4LR44 based on their chemical composition. Interestingly, there are numerous other designations for these batteries, such as PX28A, A544, 28A, K28A, K28L, V34PX, 476A, 4A76, 2CR1/3N, and 2CR11108. The variety of labels embodies a certain level of complexity.

So, how crucial is understanding these equivalences and specifications? Experience suggests that selecting the right type, based on both chemical composition and application environment, can notably enhance performance and longevity of devices. It becomes clear that informed choices pave the way for optimized device operation.

Catalog

4LR44, 4SR44, A544, PX28L Battery Characteristics and Specifications

The dimensions of the 4LR44/4SR44 batteries are 25.2mm in height and 13mm in diameter (approximately 0.992 x 0.518 inches). They feature an internal structure comprising four LR44 or SR44 cells stacked vertically. Manufacturers often provide battery holders that support the use of a single 4LR44/4SR44, four LR44/SR44 batteries, or two CR11108 cells.

Examining capacity reveals that:

• - The typical capacity of an alkaline 4LR44 battery is between 130-170 mAh.
• - A 4SR44 battery usually exhibits a capacity of about 150-200 mAh.

The PX28L or 2CR1/3N lithium batteries comprise two lithium manganese dioxide cells connected in series, marking a nominal voltage of 6.0V. When considering voltage and capacity, the drain current and device requirements offer a fascinating interplay. For example:

• - The Energizer A544 battery typically has a capacity of 178 mAh.
• - The Varta V28PX high-drain silver oxide battery has a typical capacity of 145 mAh, supporting a higher drain current.

Chemistry	Alkaline	Silver-Oxide
Nominal Voltage	6.0 volts	6.2 volts
End-Point Voltage	3.6 - 4.0 volts	3.6 - 4.8 volts
Notes	Voltage drops over time	Very constant voltage
Typical Labels	4SR44 (silver-oxide), 4LR44 (alkaline), PX28A, A544, K28A, K28L, V34PX, 28A, 476A, 4A76, 2CR1/3N, 2CR11108
Typical Capacity	130-170 mAh	150-200 mAh

Which battery is suitable for what application? Real-world usage indicates that for low-drain devices, the Energizer A544 is preferable. Conversely, for high-drain devices, the Varta V28PX proves more suitable. Furthermore, the average shelf-life of 4LR44 and 4SR44 batteries ranges from 3-5 years, with low-drain models used in motherboards potentially lasting upwards of 5-7 years.

4LR44, 4SR44, and PX28L Battery Comparison

Battery Datasheet	Capacity	Operating Temperatures	Annual Self-Discharge Rate	Discharge Currents
Duracell PX28L (2CR1/3N) Lithium Manganese Dioxide	160 mAh nominal, 185 mAh rated, 30kΩ down to 4.0V @20°C	-20°C to +75°C	<1% @20°C	2.7 mA std. cont.
Energizer A544 Alkaline	178 mAh, 30kΩ down to 3.6V @21°C	-	-	0.16 mA std. cont.
GP 476AF Alkaline	-	-	3-year shelf life	-
Kodak K28A Alkaline	120 mAh, 27kΩ down to 3.6V	-10°C to +45°C	-	-
Panasonic 4SR44 Silver-Oxide	160 mAh	-	3-year shelf life	-
Varta V28PX Silver-Oxide	145 mAh, 20kΩ down to 3.6V @20°C	-10°C to +60°C	-	0.32 mA std. cont.

In the market, 13.0 x 25.2 mm cylindrical 6V batteries abound. Lithium manganese dioxide (LiMnO2) batteries show similar capacities and are versatile, handling both low current and high pulse drain discharges. On the other hand:

• - Alkaline and silver oxide batteries, made by stacking four cells in series, exhibit different performances based on application.

What does human experience teach us? In varied environments, lithium batteries are more reliable for prolonged storage and steady performance in fluctuating temperatures, whereas alkaline batteries offer better cost-efficiency for short-term projects.

4LR44/4SR44 Battery Safety Lssues

Although 4LR44/4SR44 batteries are not the smallest, there is still a risk of ingestion by children or pets. What should one do in such an event? Immediate contact with emergency services is paramount. Despite modern batteries being free from mercury and cadmium, ingestion can initiate an electrolytic process within the body, potentially causing chemical burns.

Choosing reputable brands can enhance safety and reliability. Examples include:

• - PetStandard 4LR44
• - Energizer 4LR44 A544
• - GoodBoy 4LR44
• - Panasonic 4SR44

Despite their higher cost, 4SR44 batteries, with greater energy density and more stable output voltage, generally perform superiorly in demanding applications. Ultimately, selecting a battery should involve not only a review of technical specifications but also the historical performance and reliability under real-world conditions. This multidimensional approach ensures that the chosen battery meets anticipated needs and offers optimal performance.