It seems I cannot find complete explanation for this question everywhere on the internet.

So far, I know the followings:

  • L - Alkaline as +/Zinc as -
  • R - round
  • 11 - battery's diameter in mm (in fact, the standard states, that the actual diameter is 11.6 mm[1])
  • 54 - battery's height in 0.1 mm

What's the meaning of 44?

  • 1
    \$\begingroup\$ The wonderful thing about standards is just how many of them we have to choose from. \$\endgroup\$ Jan 2, 2017 at 19:01
  • \$\begingroup\$ @ScottSeidman, what's the logic behind that naming? I cannot believe it is randomly chosen. \$\endgroup\$
    – Qeeet
    Jan 2, 2017 at 19:04
  • \$\begingroup\$ en.wikipedia.org/wiki/LR44_battery \$\endgroup\$ Jan 2, 2017 at 19:13
  • \$\begingroup\$ @ScottSeidman, I've read that article, unfortunately I didn't find an answer there. It doesn't explain what is the meaning of 44 in a right way \$\endgroup\$
    – Qeeet
    Jan 2, 2017 at 19:17

2 Answers 2


LR44 is some companies proprietary name for the IEC LR1144 battery.


Manufacturers may assign proprietary names and numbers to their batteries, disregarding common, colloquial, IEC, and ANSI naming conventions (see LR44 battery as an example). Often this is done to steer customers towards a specific brand, and away from competing or generic brands, by obfuscating the common name.

The table in the middle of https://en.wikipedia.org/wiki/List_of_battery_sizes#Silver_oxide_and_alkaline_cells shows that the LR1144 IEC designation corresponds to the "most common" name of SR44, otherwise called the LR44

  • \$\begingroup\$ Thank you for the help in finding the truth on this noisy internet \$\endgroup\$
    – Qeeet
    Jan 2, 2017 at 19:29

Look on Wikipedia:

"The battery nomenclature is defined by the International Electrotechnical Commission (IEC) in its 60086-3 standard (Primary batteries, part 3 Watch batteries). The letter "L" indicates the electrochemical system used: a zinc negative electrode, manganese dioxide depolarizer and positive electrode, and an alkaline electrolyte. "R44" indicates a cylindrical ("round") cell 11.4±0.2 mm diameter and 5.2±0.2 mm height."

LR44 Battery

  • \$\begingroup\$ I went through that article, I cannot find any connections between R44 and "11.4±0.2 mm diameter and 5.2±0.2 mm height." \$\endgroup\$
    – Qeeet
    Jan 2, 2017 at 19:14

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