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Battery size chart Household battery sizes with their exact dimensions in millimetres, voltage and typical capacity. Codes such as LR6 (AA) and LR03 (AAA) are the international names printed in small type on the battery.
D ⌀34.2 × 61.5 mm C ⌀26.2 × 50 mm AA ⌀14.5 × 50.5 mm AAA ⌀10.5 × 44.5 mm D, C, AA and AAA at the same scale. Household batteries (AA, AAA, C, D, 9V) Battery Size (mm) Volts Capacity Also called AA 14.5 mm × 50.5 mm 1.5 V ≈ 2,700 mAh LR6, MN1500, 15A AAA 10.5 mm × 44.5 mm 1.5 V ≈ 1,150 mAh LR03, MN2400, 24A AAAA 8.3 mm × 42.5 mm 1.5 V ≈ 600 mAh LR61, MN2500, 25A C 26.2 mm × 50 mm 1.5 V ≈ 7,800 mAh LR14, MN1400, 14A D 34.2 mm × 61.5 mm 1.5 V ≈ 15,000 mAh LR20, MN1300, 13A N 12 mm × 30.2 mm 1.5 V ≈ 900 mAh LR1, MN9100, 910A 9V 48.5 mm × 26.5 mm × 17.5 mm 9 V ≈ 550 mAh 6LR61, MN1604, 1604A
Small high-voltage batteries (A23, A27, 4LR44) Battery Size (mm) Volts Capacity Also called A23 10.3 mm × 28.5 mm 12 V ≈ 50 mAh 23A, MN21, 8LR932 A27 8 mm × 28.2 mm 12 V ≈ 20 mAh 27A, MN27, 8LR732 4LR44 13 mm × 25.2 mm 6 V ≈ 150 mAh PX28A, 476A, A544
Lithium photo batteries (CR123A, CR2, CR-P2) Battery Size (mm) Volts Capacity Also called CR123A 17 mm × 34.5 mm 3 V ≈ 1,500 mAh CR17345, DL123A, EL123AP CR2 15.6 mm × 27 mm 3 V ≈ 800 mAh CR15270, DLCR2, ELCR2 CR-P2 36 mm × 34.8 mm × 19.5 mm 6 V ≈ 1,400 mAh 223A, DL223A, EL223AP 2CR5 45 mm × 34 mm × 17 mm 6 V ≈ 1,400 mAh 245, DL245, EL2CR5 CR1/3N 11.6 mm × 10.8 mm 3 V ≈ 160 mAh DL1/3N, 2L76, CR11108
Rechargeable lithium-ion cells Battery Size (mm) Volts Capacity Also called 18650 18 mm × 65 mm 3.6 V ≈ 3,000 mAh INR18650, ICR18650, NCR18650 21700 21 mm × 70 mm 3.6 V ≈ 4,500 mAh INR21700 14500 14 mm × 50 mm 3.6 V ≈ 800 mAh ICR14500, INR14500 LIR2032 20 mm × 3.2 mm 3.7 V ≈ 40 mAh ML2032, LIR2032H
Capacities are typical for alkaline (AA to D, 9V) at low drain and fall sharply in high-drain devices. Lithium-ion figures are for quality cells; see each page for safe-swap warnings.