Collection: 18650 Rechargeable Batteries

Our 18650 rechargeable batteries deliver maximum performance and safety for high-output flashlights and electronic devices. At FlashlightWorld.com, we carry only top-tier cells from trusted manufacturers like Fenix, Nitecore, Acebeam, Klarus, Molicel, Samsung, Sony, Panasonic, and Efest.

These lithium-ion 18650 batteries are designed for high-drain devices, offering stable power, extended lifespan, and built-in protection against overcharge and short-circuit. Ideal for tactical flashlights, headlamps, and professional gear requiring reliable power.

✔ 100% authentic, Grade A cells

✔ Compatible with all major flashlight brands

✔ Protected and unprotected versions available

✔ Rechargeable hundreds of times

✔ Shipped from Canada — no customs, no delays

Find the perfect 18650 battery for your flashlight and keep your gear performing at its best.

FAQ

Q1. What does “18650” mean?

It refers to the cell size — 18mm diameter and 65mm length. The “0” means cylindrical.

Q2. Can I use 18650 batteries in any flashlight?

Only in devices designed for lithium-ion cells. Always check your flashlight specs and measurements before use.

Q3. How do I recharge 18650 batteries?

Use a compatible smart charger (available in our Battery Chargers section) for safe, optimal charging.

Q4. Are these batteries protected?

Most of our 18650s include a protection circuit. Each product description specifies this detail.