Battery equivalents

Which battery is this?

Type whatever is printed on the battery. You'll get its standard name, every other name it's sold under, and its size and voltage.

Battery equivalent chart

33 common household batteries, each with the names it's sold under. Every name in a row is the same physical cell.

Standard sizes

AA, AAA, C, D and 9V: remotes, toys, clocks, smoke alarms.

Code	Also sold as	Voltage	Size (mm)
AA	LR6, MN1500, 15A, Mignon	1.5 V	14.5 × 50.5
AAA	LR03, MN2400, 24A, Micro	1.5 V	10.5 × 44.5
C	LR14, MN1400, Baby	1.5 V	26.2 × 50
D	LR20, MN1300, Mono	1.5 V	34.2 × 61.5
9V	6LR61, PP3, 6F22, MN1604, E-Block	9 V	48.5 × 26.5 × 17.5
AAAA	LR61, MN2500	1.5 V	8.3 × 42.5

Coin cells

3 V lithium coins: AirTags, key fobs, scales, sensors.

Code	Also sold as	Voltage	Size (mm)
CR2032	DL2032, ECR2032, 5004LC	3 V	20 × 3.2
CR2025	DL2025, ECR2025, 5003LC	3 V	20 × 2.5
CR2016	DL2016, ECR2016, 5000LC	3 V	20 × 1.6
CR2450	DL2450, ECR2450, 5029LC	3 V	24.5 × 5
CR2430	DL2430, 5011LC	3 V	24.5 × 3
CR2477	DL2477	3 V	24.5 × 7.7
CR1632	DL1632, ECR1632	3 V	16 × 3.2
CR1620	DL1620, ECR1620, 5009LC	3 V	16 × 2
CR1616	DL1616, ECR1616	3 V	16 × 1.6
CR1220	DL1220, ECR1220, 5012LC	3 V	12.5 × 2

Button cells

1.5 V alkaline and silver oxide: watches, calipers, thermometers.

Code	Also sold as	Voltage	Size (mm)
LR44	AG13, A76, 357, SR44, 303, L1154, G13	1.5 V	11.6 × 5.4
LR41	AG3, 392, SR41, 192, 384, G3	1.5 V	7.9 × 3.6
LR1130	AG10, 389, 390, 189, SR54, G10	1.5 V	11.6 × 3.1
LR43	AG12, 386, 301, SR43, 186	1.5 V	11.6 × 4.2
SR626SW	377, 376, AG4, LR626, SR626, 177	1.55 V	6.8 × 2.6
SR621SW	364, 363, AG1, LR621, SR621	1.55 V	6.8 × 2.1
SR920SW	371, 370, AG6, LR920, SR920	1.55 V	9.5 × 2.1

Hearing aid

Zinc-air cells with a coloured tab.

Code	Also sold as	Voltage	Size (mm)
Size 10 hearing aid	PR70, Yellow, A10	1.45 V	5.8 × 3.6
Size 312 hearing aid	PR41, Brown, A312	1.45 V	7.9 × 3.6
Size 13 hearing aid	PR48, Orange, A13	1.45 V	7.9 × 5.4
Size 675 hearing aid	PR44, Blue, A675	1.45 V	11.6 × 5.4

Photo lithium

3 V cylinders: cameras, flashlights, alarm sensors.

Code	Also sold as	Voltage	Size (mm)
CR123A	CR17345, 123, DL123A, EL123AP	3 V	17 × 34.5
CR2	CR15270, DLCR2, ELCR2	3 V	15.6 × 27

Specialty

12 V and 6 V cells: car remotes, doorbells, dog collars.

Code	Also sold as	Voltage	Size (mm)
23A	A23, MN21, V23GA, 8LR932, LRV08	12 V	10.3 × 28.5
27A	A27, MN27, 8LR732, V27A	12 V	8 × 28.2
4LR44	476A, PX28A, A544, 28A	6 V	13 × 25.2

Rechargeable Li-ion

Cylindrical cells inside packs, flashlights and vapes.

Code	Also sold as	Voltage	Size (mm)
18650	INR18650, ICR18650	3.6 V	18.4 × 65

How to read a battery code

Most batteries carry an IEC code. The first letter is the chemistry, the R means round, and on coin and button cells the digits are the size.

Letter	Chemistry	Example
L	Alkaline, 1.5 V	LR44
S	Silver oxide, 1.55 V	SR626SW
C	Lithium, 3 V	CR2032
B	Lithium (CFx), 3 V	BR2032
P	Zinc-air, 1.4 V	PR41

So a CR2032 is a round lithium cell, 20 mm across and 3.2 mm thick, and a CR2025 is the same width at 2.5 mm. A leading number counts stacked cells: a 4LR44 is four LR44 cells in one tube, at 6 V.

Numbers like 357, 377 or 23A are older maker and watch-trade codes. They don't describe anything, so you have to look them up. That's what the finder above is for.

Questions

How do I find a replacement for a battery?

Read the code printed on the battery, or on the device near the battery door, and type it into the finder. It shows the standard name and every other name the same battery is sold under, so you can buy any of them.

Why does the same battery have so many names?

Each standard and each brand names cells its own way. The IEC name (LR44) describes the chemistry and size, ANSI uses numbers (1166A), Duracell, Energizer and Varta have their own codes, and watch makers use another set (357). They all describe the same physical cell.

What do the letters in a battery code mean?

In IEC codes the first letter is the chemistry: L is alkaline, S is silver oxide, C is lithium, B is a different lithium (CFx) and P is zinc-air. R means round. For coin cells the digits are the size: CR2032 is 20 mm across and 3.2 mm thick.

Can I use a battery with a different letter but the same numbers?

Only if the voltage matches. An SR44 can replace an LR44 (both about 1.5 V, silver oxide just lasts longer). A CR2032 is 3 V and a completely different size, despite the similar look.

Can I use a thinner coin cell if it's the same width?

Sometimes, as a stopgap. A CR2025 often works in a CR2032 holder if the contacts press firmly, but it holds less charge. A thicker cell in a thinner slot won't fit. Never stack two thin cells to fill a gap: that doubles the voltage.

Battery Inventory for iPhone and iPad

Never look up a battery twice.

Battery Inventory remembers which battery every device in your home takes, reminds you when one is due, and counts the spares in your drawer, so you buy the right cell before the old one dies. The finder in the app knows every code on this page. Search any of them, or point the camera at a coin cell to read it.

Battery change reminders, free
Monthly smoke and CO alarm test reminders
A spares drawer and shopping list
Cordless tool packs and chargers too

Get it on the App Store More about the app

No account needed. Smoke and CO alarm features are reminders only: the app can't see or test your alarms.

The Add Device grid in Battery Inventory, with a callout showing that a 357 cell is an LR44, also sold as AG13, SR44 and A76.