Match My Battery

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

Common battery sizes with dimension callouts Technical line drawings of CR2032, CR2025, CR2016, AA, AAA and CR123A batteries. CR20323 V20.0 mm3.2 CR20253 V20.0 mm CR20163 V20.0 mm AA1.5 V50.5 mm AAA1.5 V CR123A3 V

Start with what you have

01

Search a code

Enter the complete marking to resolve exact aliases first.

 02

Compare two batteries

See size, voltage, chemistry and application limits side by side.

 03

Measure a battery

Use diameter and height to narrow candidates without declaring equivalence.

Popular battery codes

Start with the marking printed on the cell.

CR20323 V · Lithium · Lithium coin · 20 × 3.2 mmCR20253 V · Lithium · Lithium coin · 20 × 2.5 mmLR441.5 V · Alkaline · Alkaline button · 11.6 × 5.4 mm3771.55 V · Silver oxide · Silver oxide · 6.8 × 2.6 mmCR123A3 V · Lithium · Camera & specialty · 17 × 34.5 mmAA1.5 V · Alkaline · Household · 14.5 × 50.5 mmAAA1.5 V · Alkaline · Household · 10.5 × 44.5 mm9V9 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
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must match
diameter & height

must match
terminal layout

must match
voltage & chemistry

Practical battery guides

How to read a button-cell codeSilver oxide vs alkaline button cellsCan you replace a CR2032 with an LIR2032?How to measure a battery safely