Comparison

LR44 vs SR44

LR44 and SR44 are the same physical size but use different chemistries. Do not treat them as automatically interchangeable.

At a glance

Question	Answer
Same battery?	No — see chemistry and size below
Same dimensions?	Yes
Same chemistry?	No — do not swap by size alone
Same voltage?	Check each code
Direct substitute?	Only if the device documentation names that exact code

Both are about 11.6 × 5.4 mm button cells. LR44 is alkaline (~1.5 V). SR44 is silver oxide (~1.55 V) and is often sold as 357 or 303.

A device that names SR44 / 357 may run poorly or briefly on alkaline LR44 even when the cell fits. Prefer the chemistry the maker specifies.

Do not treat 357 / SR44 as an LR44 equivalent (or the reverse) without checking the device.

Do not confuse either cell with thinner LR1130 / AG10 cells — same diameter family, different height.

Label	Resolves to	Type	Size
LR44	LR44	1.5V alkaline button cell	11.6 × 5.4 mm
SR44	SR44	1.55V silver oxide button cell	11.6 × 5.4 mm

Device counts: LR44 (32) · SR44 (6)

Same battery, pack labels, or same size with a different type — not a generic “compatible with” list.

From LR44

Same size, different type

Fits the same slot. Different type — check the manual.

From SR44

Same size, different type

Fits the same slot. Different type — check the manual.

Shop the code your device names — not a size twin.

Search Amazon for packs of this battery code.

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.

Search Amazon for packs of this battery code.

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.