terminat0r @terminat0r@qoto.org

#TodayILearned: the numbers in the #CR2032, #CR2025 #buttonCell #batteries and the likes represent the #battery's dimensions, eg.:
CR2032: lithium, 20 mm diameter, 3.2 mm height
CR2025: lithium, 20 mm ⌀ x 2.5 mm ↕
#SR516: silver, 5.8 mm ⌀, 1.6 mm ↕
#LR1154/#SR1154: alkaline/silver, 11.6 mm ⌀, 5.4 mm ↕.

The letters denote their common name / positive electrode
L→Alkaline / Manganese dioxide
S→Silver / Silver Oxide
C→ Lithium / Manganese dioxide
etc
While the 'R' means 'Round'

#TIL