SureFire CR123A Batteries

SureFire CR123A batteries are non-rechargeable 3V lithium-manganese dioxide (LiMnO2) cells designed for high-drain devices, especially SureFire flashlights and weapon lights. They offer dependable output, long shelf life, and reliable performance across a wide temperature range.

Key specs

Chemistry	Lithium-Manganese Dioxide (LiMnO2), primary (non-rechargeable)
Nominal voltage	3V
Typical capacity	~1550 mAh
Size	CR123A / CR17345 (approx. 17 mm ⌀ × 34 mm length)
Weight	~17 g per cell
Shelf life	Up to 10 years (store cool and dry)
Operating temp	-4°F to 140°F (-20°C to 60°C)
Safety	PTC and safety vent for heat/short-circuit protection

Best for

• SureFire LED flashlights and weapon lights that specify CR123A cells
• High-drain compact gear: tactical lights, headlamps, camera flashes, sensors
• Kits that need long storage readiness (emergency or duty bags)
• Cold-weather use where alkaline batteries underperform

Consider alternatives if

• Your device supports rechargeable 18650 or 21700 cells and you want lower cost per cycle
• You need USB-recharge convenience (choose a rechargeable platform instead)
• Your device is incandescent: use only the specified primary cells; do not substitute rechargeables

Runtime guidance (estimates)

Actual runtime depends on the light’s driver efficiency, output mode, and temperature, but these quick estimates help plan:

• Single-cell compact LED (~300 lumens drawing ~0.7 A): about 1.5–2.0 hours
• Dual-cell tactical LED (~800–1,000 lumens, ~1.5–2.0 A combined): about 1.0–1.5 hours on high, much longer on medium/low
• Low modes (20–50 lumens): commonly 10–30+ hours per cell

Tip: For duty use, carry at least one full spare set. For weekly training or frequent high output, budget 2–4 cells per month for a dual-cell light.

Compatibility notes

• Names you may see: CR123A, CR123, CR17345 — these generally refer to the same size used here.
• 16340 rechargeable Li‑ion cells (3.6–3.7V nominal) are not the same as CR123A (3.0V) and can damage devices not rated for them. Use only if your device explicitly supports 16340.
• SureFire SFLFP123 (LiFePO4 ~3.2V) rechargeables are for specific compatible LED models only. Do not use rechargeable cells in incandescent lights.
• In devices requiring two cells, use matched cells: same brand, age, and charge state. Never mix old and new batteries.

Handling and safety

• Installation: Observe polarity marks in the device. Do not force the cell into the compartment.
• Storage: Keep in original packaging or a battery case, cool and dry. Avoid temperatures above 140°F (60°C).
• Do not recharge, short, puncture, or expose to fire. If a cell becomes hot, hisses, or leaks, discontinue use and isolate it.
• Transport: Keep terminals covered so loose cells cannot contact metal objects.
• Disposal: Recycle through battery collection programs where available; follow local regulations.

Buying tips

• Pack sizes: Single cells for occasional use; bulk packs (e.g., 12 or more) lower cost for regular duty or training.
• Stock rotation: Mark purchase date and use first-in, first-out to preserve the 10-year shelf life.
• Avoid counterfeits: Purchase from reputable sellers; check packaging integrity and expiration codes.

Pros and cons

• Pros: High energy density for size, strong cold-weather performance, long shelf life, stable voltage for LEDs
• Cons: Single-use (higher ongoing cost than rechargeables), not USB-rechargeable, must observe device voltage compatibility

FAQ

Are CR123 and CR123A the same?

Yes, most manufacturers use CR123 and CR123A interchangeably for this size (also labeled CR17345). Always follow your device’s label.

Can I recharge SureFire CR123A batteries?

No. These are primary (non-rechargeable) cells. Never attempt to recharge them. Use only approved rechargeable alternatives in devices designed for them.

How do these perform in cold weather?

Better than alkaline cells. They are rated from -4°F to 140°F; expect some runtime reduction in extreme cold. Keep a spare set warm in a pocket as a backup.

Will 16340 rechargeable cells work in my CR123A flashlight?

Only if the flashlight explicitly allows 16340 use. 16340 cells have a higher voltage (3.6–3.7V nominal) and can damage non-rated devices.

How many should I keep on hand?

For duty or emergency kits, keep at least one full spare set per device. For frequent high-output use, plan several sets per month depending on runtime needs.