Find the battery that actually matches.

Search the code printed on your battery—or identify it by size. We separate exact replacements from same-size compromises.

Source-backed specifications · Reviewed compatibility rules · No sponsored rankings

Start with what you have

Exact code

Resolve a complete marking to one canonical profile and its reviewed aliases.

Compare cells

Separate exact equivalents, conditional substitutes and non-equivalent lookalikes.

Measure an envelope

Use dimensions to narrow candidates, then verify chemistry, voltage and terminals.

Popular battery codes

Start with the marking printed on the cell.

CR20323 V · Lithium · Lithium coin · 20 × 3.2 mm CR20253 V · Lithium · Lithium coin · 20 × 2.5 mm LR441.5 V · Alkaline · Alkaline button · 11.6 × 5.4 mm 3771.55 V · Silver oxide · Silver oxide · 6.8 × 2.6 mm CR123A3 V · Lithium · Camera & specialty · 17 × 34.5 mm AA1.5 V · Alkaline · Household · 14.5 × 50.5 mm AAA1.5 V · Alkaline · Household · 10.5 × 44.5 mm 9V9 V · Alkaline · Household · 26.5 × 17.5 × 48.5 mm

Why same size is not the same battery

Dimensions answer whether a battery fits. Voltage, chemistry, terminal layout and drain behavior answer whether it belongs.

Physical fitCase, space and contacts.Electrical matchVoltage and chemistry range.Application fitDuty, drain and environment.

Read our compatibility method

must match
diameter & height

must match
terminal layout

must match
voltage & chemistry

Practical battery guides

How to read a button-cell code Silver oxide vs alkaline button cells Can you replace a CR2032 with an LIR2032?How to measure a battery safely

How to choose a replacement without guessing

Start with the complete marking when it is readable. If the marking is missing, measure the cell and use the result as a shortlist. A code alias can establish identity; matching dimensions alone cannot establish compatibility.

Exact codeResolve a complete marking to one canonical profile and its reviewed aliases.Compare cellsSeparate exact equivalents, conditional substitutes and non-equivalent lookalikes.Measure an envelopeUse dimensions to narrow candidates, then verify chemistry, voltage and terminals.

Three checks before installation

Physical fit asks whether the case seats and contacts close. Electrical compatibility asks whether voltage, polarity and chemistry belong in the device. Application fit asks whether drain behavior, charging requirements and the manufacturer’s instructions also align.