Samsung 30Q Battery

7,00 €

Type: 18650
Capacity: 3000mAh
Dimensions: (Height) 64.9 mm (Diameter) 18.3 mm
Voltage: 3.6V
Maximum continuous discharge current: 15A

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Samsung 30Q Rechargeable Battery – Model INR 18650

The Samsung 30Q battery is a lithium-ion cell with a capacity of 3000mAh and a nominal voltage of 3.6V. It is designed for flashlights and devices that require a high discharge current.

This model features a flat-plus connector and operates without a built-in protection circuit. It is suitable for flashlights designed for unprotected batteries—such as those from Dulotec and Zebralight.

Technical Specifications

Specifications	Value
Type	18,650 INR
Model	Samsung 30Q
Rated Capacity	3,000 mAh
Minimum capacity	2,700 mAh
Rated voltage	3.6V
Voltage at the end of charging	4.20 V
Voltage at the end of the discharge	2.5V
Maximum continuous discharge current	15A
Maximum instantaneous discharge current	22A (for 5 seconds)
Normal charging	1500 mA
Fast Charging	4,000 mA
Elevation	64.9 mm
Diameter	18.3 mm
Weight	45.9 g
Type Plus	Flat top

Batteries with or without protection—what's the difference?

Batteries with built-in protection contain a small circuit board that protects the cell from overcharging, over-discharging, and excessive current. When a critical value is reached, the protection automatically shuts off.

Protected batteries are slightly longer and wider than standard ones. They are not compatible with all flashlights—especially those designed for standard-size batteries or requiring high current.

Protected Batteries – Compatible with Acebeam, Olight, Fenix, Nitecore, and Armytek
Unprotected batteries—suitable for Zebralight and Dulotec flashlights
Before purchasing, measure the size of the original battery in mm and compare it with the specifications

Rules for Safe Use and Storage

Improper handling of lithium-ion batteries can cause a fire or explosion. Follow these guidelines:

Do not modify, puncture, cut, or crush the battery
Avoid contact with water, fire, or high temperatures
Do not use in defective devices
Do not short-circuit the device or throw it into a fire
Do not overcharge or undercharge; do not charge at sub-zero temperatures
Do not use the battery if the protective film is damaged
Store only in a protective case—not in a pocket or purse

Frequently Asked Questions

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

A battery with built-in protection contains a small electronic circuit board located at one end of the cell. It monitors the voltage and current and shuts off the battery in case of overcharging, over-discharging, or excessive current. A battery without protection, such as the Samsung 30Q, does not have this circuit board—which is why it is slightly shorter and narrower. It is suitable for devices where protection is provided by the flashlight itself or the charger. Unprotected batteries can deliver a higher discharge current, making them the preferred choice for high-power tactical flashlights.

What types of flashlights is the Samsung 30Q battery suitable for?

The Samsung 30Q battery has no protection and a flat positive terminal. It is suitable for flashlights designed specifically for unprotected batteries—for example, models from Zebralight and a large part of the Dulotec lineup. It is not suitable for flashlights with mechanical reverse-polarity protection that require a raised positive terminal. Before purchasing, check the manufacturer’s instructions for your flashlight.

What is the maximum discharge current of the Samsung 30Q?

The Samsung 30Q supports a maximum continuous discharge current of 15A. Under a brief transient load, it can reach up to 22A for 5 seconds. It is precisely these specifications that make it suitable for high-power flashlights and devices with high power consumption. It is recommended not to exceed the maximum continuous current to preserve the battery’s lifespan.

How do I properly charge a Samsung 30Q battery?

The battery charges to a maximum voltage of 4.20V. The normal charging current is 1500mA, and up to 4000mA during fast charging. Use only chargers compatible with the 18650 format. Do not charge at sub-zero temperatures—this can cause irreversible damage to the cell. It is recommended that the battery not be discharged below 2.5V.

What are the dimensions of the Samsung 30Q battery?

The Samsung 30Q battery has a diameter of 18.3 mm and a height of 64.9 mm. It weighs 45.9 grams. These are the standard dimensions for an unprotected 18650 battery. Batteries with built-in protection are slightly larger, so it’s important to measure your device’s battery compartment before purchasing.

How do I store a lithium-ion battery safely?

Lithium-ion batteries must be stored in a special protective plastic case. Never leave them loose in a pocket or bag—contact with metal objects such as keys or coins can cause a short circuit. Keep them away from direct sunlight, moisture, and heat sources. The recommended charge level for long-term storage is about 50% of capacity.

How can I tell which battery is right for my flashlight?

The most reliable way is to measure the flashlight’s original battery with a caliper—in millimeters, for both diameter and length. Then compare these measurements with the technical specifications of the battery you want. Also check whether the flashlight requires a flat or raised positive terminal, and whether it works with batteries with or without protection. If in doubt, contact the Dulotec.COM team—we’ll help you choose the right battery for your device.