SR44 Coin Cell Battery (Button Cell), IEC 60086

The SR44 coin cell battery (IEC 60086) measures 4.9 to 5.4 mm thick and 11.25 to 11.6 mm in diameter; it comes as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: SR44 battery
• Model id: iec60086-sr44
• Standard: IEC 60086 · size SR44

Files

Part key	Simplified
iec60086-sr44	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Diameter	11.25		11.6	11.425	midpoint of min–max	L1
h	Overall height	4.9		5.4	5.15	midpoint of min–max	L1
d_flat	Negative face flat diameter	3.8			3.8	single limit (min), modeled at the limit	L0 (min: one source)
r_neg	Negative face edge radius		1.5 ref		1.5	reference value	L0 (ref: one source)

Drawing

As a PDF: CC-IEC60086-COIN-SZ-SR44.pdf.

From the maker's datasheet

As written on the ENERGIZER A76 datasheet (energizer-a76), the maker's typical values for one product, not the standard's limits.

• Chemical System: Manganese Dioxide (MnO2)
• Designation: ANSI/NEDA 1166A, IEC-LR44
• Nominal Voltage: 1.5 Volts
• Typical Capacity: 150 mAh* (to 0.9 volts)
• Typical Weight: 2.4 grams (0.08 oz.)

The SR44 coin cell battery beside the CR2450

The SR44 is the last of the 9 IEC 60086 coin cell batterys published here, listed from CR1220 to SR44.

• Diameter (d): 11.25 to 11.6 mm on the SR44 coin cell battery, against 24.2 to 24.5 mm on the CR2450.
• Overall height (h): 4.9 to 5.4 mm on the SR44 coin cell battery, against 4.6 to 5 mm on the CR2450.

Other sizes

• One size smaller: CR2450 Coin Cell Battery (Button Cell), IEC 60086, 24.2 to 24.5 mm diameter, 4.6 to 5 mm thick.

Documents

• CC-IEC60086-COIN-DS-SR44.pdf: SR44 datasheet: values with levels, sources
• CC-IEC60086-COIN-SZ-SR44.pdf: SR44 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

energizer-a76, varta-4176, varta-4276. Full citations: the method page and this size's datasheet.

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