Highfields Amateur Radio Club
Glossary Appendix.
copyright date

Battery Details.

The differences between LR and SR cells:

LR cells are Alkaline Manganese based and have a lower energy density or capacity and are 1.5volts.
SR cells are Silver Oxide based, have a higher energy density or capacity and are 1.55volts.
See the Notes page for more info.

Do not confuse with these other batteries listed as "39"
341 (39); LR54 (RW39); AD39 (Alldry 39).

Do not confuse this "RW329" with the 329 (D329) which is a different size.


37, 39, 43, 77, 177, 280-39, 280-72, 280-101, 376, 377, 377-1, 377A, 565, 606, 606A, 619, 1176A, 1176SO, 1196SO, 28039, 280101, AG4, BA, CX66, CX626, D2V, D376, D377, E376, E377, E377CA, G4, G4A, GP77, GP377, GS4, KS377, L626, LR626, LR66, MA, R377/77, RW329, S626, SB-AW, SB-BW, SG4, SP377, SR66, SR626, SR626SW, SR626W, V377, V565,

not to scale.
Diameter × Thickness.
Chemical Composition. Nominal Voltage.
battery LR66. 6.8 mm × 2.6 mm

Case and flat side Positive.
Slightly raised area Negative.


Silver Oxide (Ag2O).

1.5 volts
(28 mAh).

1.55 volts
(30 mAh)

Back to Equivalents page.