What do the letters in CR1620 mean?

Under the IEC naming system, C is the assigned code for lithium–manganese dioxide — not taken from the spelling of those chemicals — and R means round (coin or button). The numbers encode size. Same diameter with a different first letter is a different battery. Full guide: CR vs LR vs SR.

What is CR1620 also called?

CR1620 pack labels and aliases on this site include DL1620, ECR1620, BR1620, 5009LC. These are names for the same battery entity — not chemistry substitutes.

What devices use a CR1620?

Examples on this site: Casio LW-200. Always confirm on the device page.

Battery

CR1620

3V lithium coin cell

CR1620 is a 3-volt lithium coin cell about 16 mm across and 2.0 mm thick. Casio LW-200 (module 2672) on this site takes one CR1620. It is not CR1616 (thinner / lower capacity). Some OEM manuals list CR1616 or CR1620 as approved options — buy the code named for your device.

Chemistry: lithium
Voltage: 3 V
Diameter: 16 mm
Thickness: 2 mm
Used by: 3 devices

Common uses: Key fobs · Watches · Backup cells

Common questions

What is a CR1620 battery?: CR1620 is a 3-volt lithium coin cell about 16 mm across and 2.0 mm thick. Casio LW-200 (module 2672) on this site takes one CR1620. It is not CR1616 (thinner / lower capacity). Some OEM manuals list CR1616 or CR1620 as approved options — buy the code named for your device.
What do the letters in CR1620 mean?: Under the IEC naming system, C is the assigned code for lithium–manganese dioxide — not taken from the spelling of those chemicals — and R means round (coin or button). The numbers encode size. Same diameter with a different first letter is a different battery. Full guide: CR vs LR vs SR.
What is CR1620 also called?: CR1620 pack labels and aliases on this site include DL1620, ECR1620, BR1620, 5009LC. These are names for the same battery entity — not chemistry substitutes.
What devices use a CR1620?: Examples on this site: Casio LW-200. Always confirm on the device page.

Other names

Genuine aliases and pack labels for this battery — not substitutes of a different chemistry.

DL1620 · ECR1620 · BR1620 · 5009LC

Related codes

Commonly confused with

CR1620CR1616

Not a substitute

Same diameter class; height/capacity differ

Rechargeables are not equivalents

Rechargeable coin cells (LIR, ML, VL, CTL and similar) are not drop-in replacements for disposable CR cells — voltage and charging requirements differ. Same size does not mean the same battery.

Size family

Edge thickness in the 16 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

CR1616

1.6 mm

CR1620

2 mm

CR1632

3.2 mm

Devices using CR1620

2 / 3

All (3)Calculators (2)Watches (1)Texas Instruments (2)

Used in

Calculators2 devices Watches1 device

Brands: Texas Instruments

Learn more

Testers & chargers

Optional tools that fit this cell type — only where the chemistry allows. Separate from the battery answer.

Amazon links may earn us a commission. They do not change the battery answer.

Coin cell / button cell battery tester
Quick check of CR / LR / SR button and coin cells before fitting
Buy on Amazon More tools
ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
Docs Buy on Amazon More tools
Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
Docs Buy on Amazon More tools

Coin / button cell tester
Quick check for CR / LR / SR coin cells
Open-circuit voltage alone does not prove remaining capacity.
How to test a coin cell Buy on Amazon

Buy links are optional and separate from the battery answer.

Need one?

Need a CR1620?

Search Amazon for packs of this battery code.

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Notes

3V lithium coin 16×2.0 mm. Not CR1616 (thinner / lower capacity). Some OEM manuals list CR1616 or CR1620 as approved backups — verify the device page.