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Eagletac 18650 2600mAh

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

Pending Details: Official Dimensions, Weight, Discharge Current

Chemistry: Lithium Ion

Classification: Protected 18650

Size: 18690

Build: Cell, Button Top

Weight: - g

Height: 69 mm ± 0.1 mm

Diameter: 18 mm ± 0.1 mm

Quantity Per Pack: 1

Nominal Voltage: 3.7 V

Maximum Voltage: 4.2 V

Nominal Capacity: 2600 mAh

Operating Temperature: -20°C ~ 60°C

Maximum Discharge Current: - A

Self Discharge Rate: ~10% per month

Recharge Cycles: 300 - 600

High Current Discharge Protection (PTC): - 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.


Why are we adding a 2600mAh when we have 3400mAh and 3500mAh?

The cost of this battery is roughly half that of the larger sizes.

Compare the cost of getting one 3400mAh or 3500mAh to getting two 2600mAh. It costs a little more and will require switching out the batteries, but the total capacity will be 5200mAh. Even just getting one 2600mAh is good if looking to save some money.

Keep in mind that most of the recent models of flashlight have their run time measured with 3400mAh (sometimes the 3500mAh).

The 2600mAh can make a great first 18650 to save money over the larger sizes. By switching to an 18650 based flashlight, the savings compared to using AA, C, D or CR123A Primary batteries will pay for itself, the flashlight and the 18650 to replace it after 300-500 recharge cycles.