Energizer EL123 (CR123A) Lithium Batteries

Energizer EL123 batteries are 3V primary lithium cells sized for devices that demand compact, high‑drain power—LED flashlights, film/digital cameras, and home/business security sensors. They maintain stable output in harsh temperatures and store well for emergency use.

Key specs

• Chemistry: Lithium (Li‑MnO2, primary/non‑rechargeable)
• Nominal voltage: 3V
• Size: CR123A (approx. 17 mm diameter × 34.5 mm length)
• Operating temperature: -40°F to 140°F
• Shelf life: up to 10 years (stored at room temperature)
• Leak‑resistant construction

When to choose these

• Your device lists CR123A, EL123, DL123A, K123L, or “123” batteries.
• You need dependable power for intermittent high‑drain loads (tactical lights, motion sensors, camera strobes).
• You use gear in cold weather where alkaline batteries underperform.

When to avoid

• Your device specifically requires rechargeable 16340/RCR123A (3.6–3.7V) cells.
• The product is designed for AA/AAA or another form factor.
• You plan to mix different battery brands, types, or partially used cells in the same device.

Compatibility and equivalents

EL123 is Energizer’s designation for the standard CR123A size and 3V chemistry. Common cross‑references include CR123A, DL123A (Duracell), K123L (Kodak), and 123. Always match the size and voltage listed in your device manual.

Typical runtime examples

• Compact LED flashlight (300–500 lumens): about 1–2.5 hours on high per cell.
• Motion sensor or alarm contact: roughly 6–24 months depending on signal frequency and environment.
• Camera strobe/flash: hundreds of moderate‑power flashes; fewer at full‑power bursts.

Actual runtime varies with device design, drain profile, and temperature.

Storage and safety

• Store in original packaging, in a cool, dry place (about 50–77°F), away from metal objects.
• Do not recharge, crush, short, or incinerate. Primary lithium cells can vent if abused.
• Install with correct polarity; remove batteries from devices stored long‑term.
• Recycle through approved battery collection programs; do not dispose of in household trash.

Tips to maximize performance

• Rotate inventory first‑in, first‑out; buy only what you’ll use within 3–5 years.
• Keep a spare warm in cold conditions to reduce voltage sag; swap when needed.
• Wipe device contacts before installation to ensure low resistance and stable output.

Alternatives

• Other primary CR123A brands (e.g., DL123A, CR123A from major manufacturers) for equivalent 3V performance.
• Rechargeable 16340/RCR123A (3.6–3.7V) only if the device manual explicitly supports them; expect different brightness and runtime.

FAQ

Are EL123 and CR123A the same?

Yes. EL123 is Energizer’s name for the CR123A size and 3V chemistry.

Can I recharge EL123 batteries?

No. They are primary (non‑rechargeable) lithium cells. Recharging is unsafe.

How do I check freshness?

Look for the expiration date on the packaging. Choose the latest date and store unopened until needed.

Is it safe to mix brands or old and new cells?

No. Mixing can cause leakage, poor performance, or device damage. Replace all cells in a device at the same time with the same brand and age.

How should I dispose of used cells?

Use local battery recycling or hazardous waste programs. Tape the terminals before transport to prevent short circuits.