Eagletac 18650 3400mAh


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Note: Canada Post does not allow Air shippment of Lithium Batteries.

Chemistry: Lithium Ion

Classification: Protected 18650

Size: 18680

Build: Cell, Button Top

Weight: 50 g

Height: 68 mm ± 0.1 mm

Diameter: 18.6 mm ± 0.1 mm

Quantity Per Pack: 1

Nominal Voltage: 3.7 V

Maximum Voltage: 4.2 V

Nominal Capacity: 3400 mAh @ 0.2C or 680 mA
Capacity: 3300mAh @ 1.5 A

Operating Temperature: -20°C ~ 60°C

Maximum Discharge Current: 5 A

Self Discharge Rate: ~10% per month

Recharge Cycles: 300 - 600

Current Overflow Protection: 5 A - 6 A


  • Use a Constant Current, Constant Voltage (CC/CV) Charger.
  • Environment Temperature: 0°C to 40°C


  • Less than 30 days: -20°C to 45°C
  • Less than 90 days: -20°C to 35°C
  • Less than 1 year: 0°C to 25°C
  • Best: 10°C to 15°C
  • When leaving Li-Ion batteries in storage, recharge every 9 months to ensure battery is still functional.
  • When using Li-Ion batteries that have been in storage for over 5 months, it is recommended to recharge the batteries. Li-Ion batteries in storage for over 9 months will require recharging before use.


Each battery is in an anti-static bag and individually boxed.


No Memory Effect Capacity Loss - Recharging a Li-Ion battery before it has been fully discharged will not reduce the storage capacity of the battery.

No Over Discharge Leakage - While Alkaline batteries will eventually leak when over discharged, Li-Ion batteries will not.

Each battery has a built in protection circuit to prevent over charge, over discharge and short circuit.


Over Discharge - If a Li-Ion battery is over discharge it might not be able to be recharged. Protected Li-Ion batteries have a circuit that prevents over discharge.

Over Charging - If a Li-Ion battery is over charged or charged too fast, it may over heat and trigger a safety built into the battery (such as a pressure release valve or charge connection) that will render the battery useless. Most chargers have measures to prevent over charging and over heating of L-Ion batteries. Protected Li-Ion batteries have a circuit that prevents over charging.

Do not expose any batteries to flame or other extremely high temperatures.

Do not store batteries in direct sunlight.

Additional Details:

Chemistry: LiNiCoAlO2

Button Top Material: 304 Stainless Steel

Made in Japan, NNP battery cells - Panasonic.

4 Reviews Hide Reviews Show Reviews

  • 5
    Great Product

    Posted by Unknown on 19th Jan 2015

    This battery is great. Price is great. This battery cost the same as the two normal energizers but with 10 x the life time seeing it is rechargeable. I would recommend this product to anyone who owns the flashlight required for this battery.

  • 4

    Posted by Unknown on 26th Mar 2014

    outlasted my expectations.

  • 5
    Work Great with High powered flashlights

    Posted by Unknown on 22nd Mar 2014

    The EagleTac 3400mAh Protected Li-ion 18650 Rechargeable is an exceptional battery from an extremely reputable company. This battery delivers remarkable power and unparalleled storage capacity! These last a long time, and have fitted 2 of my favorite flashlights an Fenix PD35, and Zebra light SC600 MK 2, each fine flashlights. I would recommend these without reservation.

  • 5
    Extreme long lasting battery

    Posted by Roy MacTavish on 3rd Aug 2013

    This is a fantastic battery. All might lights run for a very long time on their high and turbo setting thanks to this bad boy battery. Example: Fenix TK22 - Rated to run for 4 hours 30 minutes on high with a 2600mah battery. With this battery I get 5 hours 50 minutes of run time. That's another hour and 20 minutes of run time. If you need an 18650 battery then buy this one. The extra $6 or $7 is worth it. Nothing worse then being in the dark with a flashlight that won't turn on because of dead batteries.