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.

Battery

CR1620

3V lithium coin cell

5009LC is a pack label for CR1620 — same battery, different name on the package.

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

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.

Buy on Amazon Amazon UK

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.

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.