NCR18650B 18650 Battery Panasonic-Japan 3400mAh Li-ion 3.7V Flat Top Rechargeable

NCR18650B is replaced by 3500mAh NCR18650GA
This model is replaced by 3500mAh NCR18650GA - available now. Please read below (product description)
Battery Cell:
Manufactured in Japan
  • Panasonic 18650 battery ncr18650b 3400mAh green flat top unprotected 3.7V li-ion
  • NCR18650B  18650 Panasonic Japan 3400 mah battery cell Li-ion 3.7V
  • NCR18650B  Panasonic 18650 battery 3400mAh green flat top unprotected 3.7V li-ion - battery case
  • Panasonic NCR18650B 3400mAh 18650 Li-ion 3.7v rechargeable Battery made in Japan
  • Panasonic 3400mAh Authentic Japan NCR18650B 18650 battery FLAT top 3.7V
  • 18650 ncr18650b panasonic negative battery terminal contact ready for spot welding
  • NCR18650B 18650 Battery Panasonic-Japan 3400mAh Li-ion 3.7V Flat Top Rechargeable
MSRP: $8.99
— You save $1.00

Temporarily Unavailable


New, 3500mAh NCR18650GA is now available.

This updated version significantly outperforms its predecessor, offering extended run times, a longer cycle life, enhanced discharge capabilities, and overall superior performance. In essence, the NCR18650GA represents a substantial upgrade from the now outdated NCR18650B model.



Flat top | Unprotected cell | Authentic NCR18650B


NCR18650B Panasonic 18650 Battery 3400mAh Rechargeable cell li-ion MH12210. Manufactured in Japan. 


We use this powerful Japanese, high capacity genuine (Grade A) Panasonic core cell to build Orbtronic-Panasonic Protected version (safety electronic protection built in) 3400mAh 18650 Li-ion rechargeable battery. 

FREE high quality battery holder included with each pair of batteries. 

Free Battery Case is included when batteries are bought in quantities of 2 or multiples of 2. (Example 2, 4, 6, 8, 10, etc.)

NCR18650B Battery Specifications:

  • Capacity (Ah): 3.4 Ah ( 3400mAh )
  • Rated Capacity at 20°C: 3.2Ah
  • Charging Voltage (V): 4.2 V
  • Energy (Wh): 12.2 Wh
  • Energy Density (Wh/L): 730 Wh/L
  • Nominal Voltage (V): 3.6V-3.7V
  • Weight (g): 46 g
  • Diameter (mm): 18.06 mm (+/- 0.03 mm)
  • Height (mm): 65 mm (+/- 0.03 mm)
  • Max. Continuous Discharge rate: C Rating 2C (Maximum load/current 6.8A)
  • Top (positive side): Flat top
  • Protected?: No, this battery is Unprotected (Without Safety Protection)
  • Battery with Full Safety Protection is available here.
  • Model-Part No: NCR18650B
  • UL Certification under: MH12210
  • Manufactured / Made in Japan
  • Made by Panasonic 





Failure to read, and follow Li-ion safety instructions, and warnings may result in fire, personal injury, and property damages if the battery is charged and/or used (mishandled) improperly.

  • DO NOT SHORT CIRCUIT. Short circuits may cause a fire and injury!
  • Charge battery fully to 4.2V before first use.
  • Use high-quality charger specifically designed to charge Li-ion batteries.
  • Do not charge unattended.
  • Always keep your battery that is not in use inside the plastic battery holder(container).
  • Do not keep a bare battery in your pocket, purse, or anywhere together with other metal (conductive) objects.
  • Never attach any metal moving part |magnet| to the top positive or the bottom negative battery contact.
  • Stop using the battery with damaged PVC tube (wrap) or terminal insulator immediately.
  • If the battery is damaged in any way stop using it immediately.
  • Never discharge a Li-ion battery at a rate exceeding the maximum discharge current specified for that battery.
  • Never use force to install (insert) Li-ion battery.
  • Do not use old, and new batteries together.
  • Do not solder directly onto the battery.
  • Do not immerse in any liquid.
  • Do not drop the battery. Always keep it in a plastic protective holder.
  • Do not place the battery in high-pressure containers, microwave ovens, or on induction cookware.
  • Immediately discontinue use of the battery if, while using, charging or storing the battery, the battery emits an unusual smell, feels hot, changes color or shape, or appears abnormal in any other way.
  • Do not carry, or store the batteries together with hairpins, necklaces, or other conductive metal objects.
  • Use only high-quality battery Li-ion charger (CC/CV 4.2 Volt max).
  • Do not expose to heat.
  • Do not disassemble, or modify the battery.
  • Keep the battery away from children, and pets.
  • Never charge, or store the batteries inside your car in extreme temperature. Extreme temperatures (low or high) might ignite the battery, and cause a fire.
  • Do not short (connect) positive, and negative battery terminals (contacts) intentionally, or unintentionally.
  • Never charge the battery over 4.25 Volts (properly charged li-ion battery is 4.2 Volts / full charge).
  • Do not reverse the positive (+) and negative (-) terminals when charging, or using the battery.
  • Never charge the battery at a current exceeding manufacturer-specified charging current.
  • Do not expose the battery to water or salt water, or allow the battery to get wet.
  • You must verify polarity before connecting the battery to the host device (or charger).
  • Never completely discharge the Li-ion battery ( below 2.5V under load ).
  • After the battery is discharged-don't leave it discharged-charge battery as soon as possible (10 min. rest time).
  • It is your responsibility to determine that your charger and host device works properly.
  • On (battery electrolytes) exposure to skin, flush with water immediately.
  • If eye exposure occurs, flush with water for 15 minutes, and seek emergency care immediately.
  •  Always keep metal objects or other materials that can short circuit battery terminals away from the batteries

What is short circuit?

The situation when battery positive (+) and negative (-) connect. The current will become extremely high because there is no resistance in the path to limit current flow. This Short circuit will result in dangerously high temperature which may cause a fire.


The use of any unprotected li-ion cylindrical battery as a stand-alone device, including with e-cigarettes, vaporizer mods or other products, constitutes a DANGEROUS misuse of the battery cells that poses a SERIOUS RISK of personal injury or property damage. These cells are only for prototyping with proper electronic protection circuits, and not for stand-alone use. 


These are high capacity Li-ion batteries. If mishandled or mistreated, these batteries can cause you SERIOUS INJURY. USE AT YOUR OWN RISK


Is Panasonic ncr18650b protected?
No, Panasonic is NOT manufacturing Protected 18650 batteries
Panasonic makes only Unprotected Flat Top bare cells (as pictured)

What is in the box?

  • Panasonic 18650 3400mAh NCR18650B li-ion battery rechargeable cell (Manufactured in Japan).
  • Protective high quality plastic battery holder included (One battery case with each pair of batteries).
  • Pro Li-ion packaging


Price listed is for one battery cell.

Fast shipping from Florida - USA.

We usually ship the same business day - 3 PM EST cutoff time.

Recommended Li-ion NCR18650B charger

New 3500mah Panasonic 18650 NCR18650GA battery is also available. 

For Geeks: 

About new Panasonic NNP (Nickel Oxide based New Platform) technology:

The core of this battery cell is newly developed Nickel-based positive electrode and enables exceptionally high 18-650 battery capacity. The material and the way it is made stops an alloy negative electrode deforming with frequent charging / discharging.


  • Superior cycle life performance. 
  • High energy density contributes to cell weight reduction. 
  • Extraordinary long shelf life. 

About new HRL (Heat Resistant Layer) technology:

This solution consists of an insulated metal oxide film between the electrodes. Insulating barrier prevents cell from dangerous overheating even under short-circuit conditions.

How to Increase Li-ion Battery Life?

View AllClose