Energizer’s 9V sheet gives both 6LF22 and 6LR61. Its AAAA sheet gives LR8D425 and LR61. The A23 sheet gives no IEC code, and the A27 sheet neither an IEC nor an ANSI code. The A544 is four LR44 cells in one 6 V battery (IEC 4LR44).
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How to read it
Size: the largest diameter and length on Energizer’s drawing, in millimeters; for a 9V and the two-cell photo packs, width x depth x height.
IEC and ANSI: the standard names Energizer prints on each sheet. LR is alkaline and CR lithium in every row here.
A23 and A27: small 12 V batteries. Duracell’s MN21 (A23) sheet lists “Automobile remote controller” and “Roll-up Door remote control” among its typical applications. The A27 is the thinner of the two, at 8 mm against 10.3 mm.
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Drawn to scale. An A23 is a little over half an AA’s length and slimmer; the CR123A and CR2 are short and wide for their length.
An AAAA is 8.3 mm across, smaller than an AAA. The CR123A and CR2 are 3 V lithium cells, twice the voltage of an AA. Coin and button cells are on the coin and button charts, and what each battery reads full and empty on the battery voltage chart.
Common questions
Are AA and AAA batteries the same voltage?
Yes, both are 1.5 V on Energizer's E91 (AA) and E92 (AAA) sheets. The AA is bigger: 14.5 x 50.5 mm against 10.5 x 44.5 mm.
Is a CR123A the same as a 123?
Yes, by Energizer: its 123 page lists CR123A and CR123 among the codes the 123 replaces, and the 123 sheet gives IEC CR17345, 3 V.
What's the difference between an A23 and an A27?
Both are 12 V on Energizer's sheets, but the A27 is smaller: 8 x 28.2 mm against the A23's 10.3 x 28.5 mm. Energizer rates the A23 at 55 mAh and the A27 at 22 mAh.
Sizes, volts and codes come from Energizer’s datasheets and its product pages, with Duracell’s MN21 sheet and GP’s 23AE page for the A23’s other codes and uses. Checked against published data from Energizer, Duracell and GP Batteries.
See all 18 sources
Energizer, E91 AA alkaline product datasheet (PDF)
Energizer, specialty and photo battery product pages: A23, A27, A544, AAAA, E90/N, 123, CR2 (Replacement for lists)
Duracell, MN21 12 V alkaline battery datasheet (PDF)
GP Batteries Australia, GP Extra Alkaline High Voltage 23AE (MN21) product page
Duracell, MN27 12 V alkaline datasheet (PDF)
Battery sizes come from battery makers' datasheets and device makers' own manuals and help pages. Check your device's manual or the old battery before you buy. If anyone may have swallowed a battery, call the National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222 straight away.
