Cylindrical Batteries reference
CR123A
Battery equivalent chart, replacements, and specs
CR123A aliases and equivalent names
Common search labels and closely related markings include CR17345, DL123A, EL123A. Packaging conventions vary, so confirm the compatibility grade, voltage, chemistry, and dimensions shown below before replacing the battery.
Voltage
3 V
Chemistry
LiMnO2
Capacity
1400–1600 mAh
Size
17×34.5 mm
CR123A17 × 34.5 mm
Exact equivalents
Exact- DL123A — Duracell
- EL123AP — Energizer
- CR17345 — IEC label
- 5018LC — Alternate ANSI-style designation
Do not use
Not CompatibleTechnical data
Specifications
| Specification | Value |
|---|---|
| IEC / Common Code | CR123A |
| Chemistry | LiMnO2 |
| Nominal Voltage | 3 V |
| Capacity | 1400–1600 mAh |
| Cutoff Voltage | ~2 V |
| Dimensions (D × H) | 17 × 34.5 mm |
| Shelf Life | ~10 years (unused, room temp) |
Typical applications
- Security cameras
- High-output flashlights
- Medical equipment
- Industrial sensors
- Photo flashes
- Tactical lights
Applications
Replacement Compatibility
Side-by-side comparisons
Frequently Asked Questions
Is DL123A the same as CR123A?
Yes. DL123A is Duracell's brand label for a standard CR123A-size 3V lithium primary cell.
Can I use CR2 instead of CR123A?
No. CR2 is smaller (~15.6 × 27 mm) with lower capacity. It will not seat correctly in a CR123A tube.
Is RCR123A a drop-in for CR123A?
Only when the device manual lists rechargeable RCR123A support. RCR cells often sit near 3.6V and need approved electronics.
CR123A vs 18650 — can I swap them?
Not without a host designed for that swap. Size, voltage, and charging requirements all differ.
How long does a CR123A battery last?
Unused shelf life is often up to ~10 years. In-device life depends on drain — security cameras and high-lumen flashlights consume cells faster than low-duty sensors.
Should I always trust cross-reference charts?
Confirm replacements with your device manual — especially for lithium vs alkaline chemistries.
Related Batteries
Review record and primary sources
Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: model and alias mapping, nominal voltage and chemistry, physical dimensions, capacity range and replacement warnings.
- CR123A Product Datasheet — Panasonic Energy, R1 (2024-07). CR123A dimensions, voltage, capacity, current and temperature range.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.
Selection notes
Do not substitute RCR123A rechargeables unless your device explicitly supports them. Prefer name-brand primary cells for security sensors that sit unused for months.
Last verified Aug 25, 2026. Always confirm voltage, chemistry, and dimensions with the device manufacturer before replacing any battery.