Size is only the first field
AA and AAA describe form factors; LR6 and LR03 identify the alkaline families represented here. A rechargeable cell can share the envelope while requiring a different charger and voltage assessment.
9 V is rectangular
The 6LR61 record uses a rectangular envelope and snap terminals, so its dimensional presentation differs from cylindrical AA through D.
Cylindrical size progression
AAA/LR03 is 10.5 × 44.5 mm, AA/LR6 is 14.5 × 50.5 mm, C/LR14 is 26.2 × 50 mm and D/LR20 is 34.2 × 61.5 mm in the current records. The similar height of AA and C does not offset their very different diameters.
The 9 V/6LR61 family is rectangular with snap terminals and therefore uses an envelope rather than the round-cell profile.
Format does not define chemistry
AA, AAA, C and D are familiar physical names. The records on this hub specifically describe alkaline LR chemistry at 1.5 V nominal. Rechargeable and primary lithium versions can share a format while requiring different electrical and charging decisions.
Applications and capacity
A flashlight, controller, alarm or toy may appear as a common application, but only the device marking or manual establishes the required size and chemistry. Capacity and runtime vary with product, load, temperature and cut-off voltage, so the hub does not publish one family-wide promise.
Canonical records
Showing 5 of 5 canonical records.
AAA / LR03 alkaline10.5 × 44.5 mm · 1.5 V nominal (alkaline) · OtherAA / LR6 alkaline14.5 × 50.5 mm · 1.5 V nominal (alkaline) · OtherC / LR14 alkaline26.2 × 50 mm · 1.5 V nominal (alkaline) · Other9V / 6LR61 alkaline26.5 × 48.5 mm · 9 V nominal · OtherD / LR20 alkaline34.2 × 61.5 mm · 1.5 V nominal (alkaline) · Other