Vapcell Dulotec 18650 3400mAh 10A/25A Battery

7,60 €

Type: 18650
Capacity: 3400mAh
Dimensions: (Height) 65.2 mm (Diameter) 18.3 mm
Voltage: 3.6V
Maximum continuous discharge current: 10A

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Vapcell Dulotec 18650 Lithium-Ion Battery, 3400mAh, 10A/25A

Vapcell offers a reliable 18650 lithium-ion battery with a capacity of 3400mAh. It is suitable for flashlights, headlamps, and other devices that require a stable and powerful power source.

Key Features

Rated capacity: 3,400 mAh
Minimum capacity: 3,300 mAh
Maximum continuous discharge current: 10A
Maximum discharge current: up to 25 A for 5 seconds
Rated voltage: 3.6V
Charging end voltage: 4.20V
Discharge-end voltage: 2.5V
Normal charging: 1000 mA, CCCV, cuts off at 100 mA
Fast charging: 2000 mA
Dimensions: Height 65 mm / Diameter 18.3 mm
Weight: approximately 49 g.
Tip type: flat

A battery with or without protection?

Protected batteries have a small circuit board built into the anode or cathode. It protects the cell from overcharging, over-discharging, and excessive current.

These batteries have a raised positive terminal and are suitable for flashlights with mechanical reverse-polarity protection. They are found in brands such as Acebeam, Olight, Fenix, Nitecore, and Armytec.

Unprotected batteries are smaller in size and support a higher output current. They are suitable for flashlights such as Zebralight and Dulotec products, which are designed specifically for standard cells.

Protected batteries are slightly longer and wider due to the additional components. They are not compatible with all flashlights. Before purchasing, measure the dimensions of the original battery in millimeters and compare them with the technical specifications of the new battery pack.

Instructions for Use

Charge the battery using a high-quality lithium-ion battery charger before using it for the first time.
Operating temperature during charging: 0°C to 45°C; during discharging: -20°C to 75°C.
Storage temperature: -5°C to 35°C.
Do not expose the battery to fire or water.
Do not crush, strike, or disassemble the battery.
Keep out of reach of children.
The battery may be hot after use—handle with care.
If stored for more than 3 months without use, recharge before the next use.

Safety Rules

The battery may catch fire or explode if used improperly. Follow these guidelines:

Do not modify, disassemble, puncture, or cut the battery.
Do not short-circuit the system.
Do not expose to water, fire, or high temperatures.
Do not use in defective devices.
Do not overcharge or undercharge the battery. Do not charge the battery at sub-zero temperatures.
Do not use the battery if the foil is damaged or compromised.
Store in a protective case—not in a pocket or purse.

Specifications	Value
Brand	Vapcell
Model	Dulotec 18650 3400mAh
Category	Lithium-ion battery
Format	18650
Rated Capacity	3,400 mAh
Minimum capacity	3,300 mAh
Rated Voltage	3.6 V
Voltage at the end of charging	4.20 V
Voltage at the end of the discharge	2.5 V
Maximum continuous discharge current	10 A
Maximum discharge current (pulse)	25 A for 5 seconds
Normal charging	1000 mA, CCCV, cut-off at 100 mA
Fast Charging	2000 mA
Peak Type	Flat
Elevation	65 mm
Diameter	18.3 mm
Weight	49 g (approximately)
Operating Temperature During Charging	0°C to 45°C
Operating temperature under low-pressure conditions	-20°C to 75°C
Storage Temperature	-5°C to 35°C

Frequently Asked Questions

What is the difference between a battery with protection and one without?

Protected batteries have a built-in circuit board that protects the cell from overcharging, over-discharging, and excessive current. When parameters exceed permissible limits, the protection circuit shuts down the battery. Protected batteries are slightly longer and wider than standard ones, as the circuit board adds to their dimensions. Unprotected batteries have standard dimensions and support a higher output current, making them suitable for flashlights designed for such cells—for example, models from Dulotec and Zebralight. Before purchasing, it is important to check what type of battery your device requires.

What is the difference between a 10A and a 25A current with this battery?

The maximum continuous discharge current for this battery is 10A—this is the current at which it can operate continuously without overheating. A current of 25A is a pulse current and can only be sustained for a short time—up to 5 seconds. Pulse mode is useful for devices that require higher power for a short time. Continuous operation at 25A is not recommended, as this can damage the battery.

How can I tell if this battery is right for my flashlight?

The easiest way is to measure the dimensions of the flashlight’s original battery in millimeters and compare them to the technical specifications of the new battery. This battery has a diameter of 18.3 mm and a height of 65 mm, with a flat positive terminal. If your flashlight requires a protected battery with a protruding positive terminal or is designed for smaller dimensions, this cell may not be suitable. If in doubt, please contact the Dulotec.COM team for advice.

How do you properly charge this battery?

The battery must be charged using a high-quality charger designed for lithium-ion batteries. Normal charging is at 1000 mA with a cut-off at 100 mA (CCCV mode). It also supports fast charging at 2000 mA. Charging must be performed at a temperature between 0°C and 45°C. Charging at sub-zero temperatures is not recommended—this may damage the cell.

How should we properly store 18650 batteries?

Batteries should be stored at a temperature between -5°C and 35°C, away from moisture, direct sunlight, and fire. Do not store them in a pocket or bag without protection—always use a special protective battery case. If a battery has not been used for more than 3 months, charge it before using it again. Keep them out of the reach of children and do not leave them in a car in extreme temperatures.

Which flashlights are suitable for unprotected batteries like this one?

Dulotec and Zebralight flashlights are designed specifically for unprotected batteries. They rely on their own electronic protection, built into the flashlight itself, and require cells that are smaller in size and have a higher output current. Unprotected batteries allow for a higher maximum current, which is important for high-power flashlights. Before use, check the flashlight’s manual for the recommended battery type.

What should we do if the battery wrap is damaged?

If the battery’s protective film is torn, scratched, or damaged, the battery must not be used. A damaged film can lead to an electric shock, a short circuit, or even a fire. Such batteries must be disposed of properly—at designated battery collection points, not in regular trash. Do not attempt to repair the foil with tape or any other material.