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The SureFire SF18650B takes the guesswork out of keeping your high-output lights ready to run. It's a protected 18650 lithium-ion cell rated at 3.6 volts and 3500mAh, which is right at the top end for a rechargeable cell this size. What sets it apart from a generic 18650 is the built-in Micro-USB charging port tucked right into the cell, so you plug it in like a phone instead of dropping it into a dedicated cradle.
This cell is built to feed SureFire's power-hungry LED lights, and it's compatible with a solid lineup including the FURY-DFT, FURY-IB-DF, EDC2-DFT, M600DF, M640DF, M640DFT and the P1R series. The 8-10A discharge rate is the real story here, because that's what lets a bright weapon light hit and hold its full lumen output instead of sagging partway through a run. If your light was designed around a dual-fuel or rechargeable setup, this is the cell it was built to take.
The convenience factor is hard to beat. A Micro-USB to USB cable comes in the box, so you can charge from a wall brick, a laptop, a power bank, or a USB port in your vehicle. Two LED indicators keep it simple: red means it's charging, green means it's topped off and ready. From fully drained, expect a USB charge to take somewhere around eight hours, so plan on charging overnight rather than five minutes before you head out. If you already own a compatible CC-CV 18650 cradle charger, you can use that too, and it may fill the cell faster.
Being a protected 18650 matters. The onboard circuitry guards against overcharging and over-discharging, which is exactly what you want in a cell that lives inside a light you depend on. It's rated to discharge across a wide temperature range from -20C to +60C, and it carries CE, PSE and UN38.3 certifications. Genuine SureFire quality in a package that fits standard 18650-compatible gear.
No, that's the whole point of this cell. It has a Micro-USB port built right into the battery, and a Micro-USB to USB cable is included in the box. You can plug it into a wall charger, laptop, power bank, or a vehicle USB port. If you happen to own a compatible CC-CV 18650 cradle charger, you can use that too.
It's designed for SureFire's dual-fuel and rechargeable lights, including the FURY-DFT, FURY-IB-DF, EDC2-DFT, M600DF, M640DF, M640DFT and the P1R series. The 8-10A discharge rate is what lets those high-output lights run at full brightness. If your light was built to accept a rechargeable 18650, this is the cell SureFire intended for it.
From completely drained, a USB charge takes roughly eight hours, so it's best to charge it overnight rather than right before you need it. The LED tells you where it stands, with red for charging and green once it's full. Using a compatible external cradle charger can shorten that time depending on the charger.
Yes, the SF18650B is a protected cell with onboard circuitry that guards against overcharging and over-discharging. That extra safety layer is exactly what you want in a battery that lives inside a light you rely on. It also carries CE, PSE and UN38.3 certifications.
| UPC | 084871328050 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SF18650B |
| Color | Red/Black |
| Length | 2.73" |
| Quantity | (1) PK |
| Shipping Weight | 0.15 |
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