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Panasonic NCR 18650 3400mAh 3.7V Unprotected High-Drain 4.87A Lithium Ion (Li-ion) Flat Top Battery - Boxed

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  • Incredible 3400mAh capacity feels like a never-ending well of power
  • Customer-favorite; performance guarantee you can rely on
  • Flat top design is ideal for DIY battery pack makers
  • 500 charge cycles saves you the cost of 499 other batteries
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1000+$4.00 ea.
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Panasonic NCR18650B Battery

4Hr Charging Time | 500 Cycles

As one of the best-known 18650 batteries out there, this Panasonic NCR18650B is definitely a fan-favorite. Packed with power-efficient lithium-ion technology, this cell features a massive 3,400mAh capacity and boasts at least 500 charge cycles. It's 4.87A discharge rate is the perfect match for moderate-to-high drain devices like LED flashlights, allowing you to get peak performance and runtimes out of your electronics. If you're into the DIY scene, the flat-top terminal is ideal for making powerpacks for your home or electric skateboard. Best of all, Panasonic 18650 batteries charge fast, often in as little as 4 hours charging time with a 4.2V cable/adapter.


  • Massive 3,400mAh capacity, extra-long runtimes
  • Rechargeable with at least 500 charge cycles
  • 4.87A discharge rating handles high-drain devices
  • Flat-top terminal is perfect for powerwalls/packs
  • Same type of battery you'll find in your laptop
  • Wide range of operating temperature; any-climate use


  • Length: 65.3mm (2.57")
  • Diameter: 18.5mm (0.73")
  • Weight: 48.5g (1.71oz)


  • Brand: Panasonic
  • Model: NCR18650B
  • Country: Japan
  • Color: Green
  • Watt-Hours (Wh): 12.2
  • Nominal Voltage: 3.6V
  • Protection: Unprotected
  • Terminal Type: Flat Top
  • Max Discharge Current: 4.87A
  • Capacity: 3,400mAh


  • Charge: 0 to +45°C
  • Discharge: -20 to +60°C
  • Storage: -20 to +5-°c
Battery Size:18650
Battery Capacity (mAh):3400
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Flat Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.658oz
Product Dimensions:2.697" (L) x 0.724" (Diameter)
Country of Origin:JP
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650

lithium-ion safety warning
28 Reviews
79% (22)
4% (1)
4% (1)
4% (1)
11% (3)
By Larry
Greenfield, WI
Hands down Best 18650 Battery I have used in Flashlights and Lasers
November 3, 2018
I was buying 18650 batteries some time ago from other sellers and they never seemed to put out what they claimed. I believe other sellers where selling re-branded Chinese cells. I only purchase batteries from Battery Junction and all there batteries that I have purchased put out or exceded specified mAh. I have a battery analyzer that will discharge then charge battery and after that show mAh. Every battery from Battery Junction is the REAL DEAL. Do not waste your time with other battery sellers for these guys sell 100% authentic cells. These Panasonic NCR 18650 3400mAh seen to last forever and put out lots of current for my most demanding searchlights. Thanks Battery Junction for being an honest seller that watches out for us. Guys buy with confidence from BJ.
By Jim
Conroe Texas
Great product
August 4, 2020
Great sight, I will definitely be shopping here again
By Joe
Very pleased with the Panasonic NCR 18650 3400mAh 3.7V
July 21, 2020
Great product works perfectly as a replacement for an ecig. Works well as a flashlight battery also. Lasts two days in the ecig. Will be buying more.

By George S.
Citrus Heights CA
Great Batery
April 21, 2020
I use my battery for an ecig mod. These last forever in that application.
By Patrick
Lancaster, CA
3400 mAH is really 2400
February 26, 2020
I have been purchasing Panasonic 3400 mAH 18650s for many years, but these are NOT 3400 mAH! I ordered 10 of these and the mAH range from 2045 mAH to a high of 2355 mAH. What a ripoff!
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