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No jargon. Here is what each number means for you.
Longer run time between charges.
Standard 18650 Li-ion. Charges to 4.2V.
Enough for bright LED flashlights.
Recharge it instead of buying more.
Drag the slider to match your device's current draw and see a rough run time on one battery.
Estimate assumes about 85% of the 3000mAh is usable. Real run time changes with temperature, device efficiency and battery age.
Pick a scene to see where this battery fits.
High-performance LED flashlights need stable current. Up to 3.6A discharge keeps them running at the brightness you expect.
Works with 18650 flashlightsSwap in a fresh cell for your pocket or tactical light before you leave. Recharge up to 500 times.
Ø18.3 × 66.5 mm · 46.5 gKeep charged spares with your emergency gear. Power your headlamp, lantern or radio during an outage.
Store charged and check every few monthsRadio-control transmitters, robotics, Arduino and microcontroller projects. A dependable 3.7V source.
Check your device's voltage and current needsPortable ham radio gear runs longer with a higher-capacity cell. Rechargeable, so every trip costs less.
Check your radio's battery compartment lengthNot for power tools or e-bikes. These need cells rated for much higher discharge current. This battery's maximum discharge is 3.6A.
| Brand | UltraFire |
| Battery type | 18650 Li-ion |
| Capacity | 3000mAh |
| Rated voltage | 3.7V |
| Charge termination voltage | 4.2V |
| Discharge termination voltage | 2.75V |
| Maximum discharge current | 1.8A – 3.6A |
| Standard discharge, 0.2C | 600 mA |
| Standard discharge, 0.5C | 1500 mA |
| Size | Ø18.3 × 66.5 mm |
| Weight | 46.5 g |
| Protection board (PCB) | Yes |
| Rechargeable | Up to 500 cycles |
| Certifications | CE, FCC, MSDS, UN38.3 |
| In the box | 2 batteries |
Check the fit before you buy. Protected cells are a little longer than unprotected ones. Make sure your device's battery compartment fits 66.5 mm, and use a Li-ion charger that stops at 4.2V.
Every order comes straight from UltraFire. If something isn't right, we fix it.
Sold directly by the official source. Every item is verified and tested.
Not satisfied? Return it within 30 days. Free replacement within 7 days.
Batteries are covered for one year. Claims go directly to our team.
US warehouses: 3–7 business days. China warehouses: 7–17 business days.
A small protection circuit board inside the battery regulates charging and discharging to help prevent damage to the cell and the circuit.
Yes. Each order is a 2-pack.
Devices that use 18650 cells at up to 3.6A, such as LED flashlights, RC transmitters, radios and DIY electronics. Don't use it for power tools or e-bikes that need higher discharge current.
Use a charger designed for 18650 Li-ion cells that stops charging at 4.2V.
Yes. Checkout uses encrypted, PCI-compliant payment systems. We accept PayPal, Apple Pay, Google Pay and major credit cards.
Shipping is free with tracking. From our US warehouses it takes 3–7 business days. From our China warehouses it takes 7–17 business days.
Email service@ultrafire.com. We offer a 30-day money-back return, a free replacement within 7 days, and a 1-year warranty on batteries.
Thanks for the really quick delivery of the batteries and charger. ( and a big thank you for the freebies!) my T6 is back up to par w/ new high capacity Lion battery power and the Q5 is certainly an impressive compact back up. My use is daily and reliability is critically important. I have a large collection of available “torches” , but the UltraFire CREE T6 is my go to choice.
Charged up great!
Great batteries (they come as a pair)
Hi there! We're glad to hear you’re happy with the batteries. Thanks for your positive review!
Buy direct
From checkout to your doorstep, every step is handled directly by us.
Buy directly from the official source. Every light is verified, tested, and shipped straight from our official warehouse.
Enjoy dedicated factory warranty coverage without the middleman runaround. Direct claims, faster turnaround, zero headaches.
Reliable door-to-door delivery with live tracking, covered entirely on us for all eligible countries and regions worldwide.
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