Battery

CR2050

3V lithium coin cell

ECR2050 is a pack label for CR2050 — same battery, different name on the package.

Chemistry: lithium
Voltage: 3 V
Diameter: 20 mm
Thickness: 5 mm
Used by: 2 devices

Common uses: Data loggers · Sensors

CR2050 Diagram

Brand-neutral outline — confirm the tray in your device.

Other names

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

DL2050 · ECR2050

Related codes

Commonly confused with

CR2050CR2016

Not a substitute

Same ~20 mm diameter family; different thickness — not interchangeable

CR2050CR2025

Not a substitute

Same ~20 mm diameter family; different thickness — not interchangeable

CR2050CR2032

Not a substitute

Same ~20 mm diameter and 3V lithium chemistry; CR2050 is much thicker (≈5.0 mm vs ≈3.2 mm) — not interchangeable

CR2050CR2050W

Not a substitute

Same ~20×5 mm lithium coin family; CR2050W is an OEM/wide-temp variant (e.g. Murata) — match the device battery option, do not flatten labels

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 20 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

1.6 mm

2.5 mm

3.2 mm

3.2 mm

5 mm

5 mm

Device-specific caveats

From manufacturer-backed notes on devices that use CR2050 — not generic advice.

Coin cells are a swallowing hazard — keep new and used cells away from children.

Devices using CR2050

Used in

Industrial sensors2 devices

Compare

CR2032 vs CR2050Compare

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 CR2050?

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

Same diameter as CR2032 but thicker. Kestrel DROP may use CR2050 only with a different battery door (Kestrel 123 door) — not a drop-in for stock DROP door.