Samsung 21700-50E 5000mAh 10A Battery

10,00 €

Type: 21700
Capacity: 5000mAh
Dimensions: (Height) 70 mm (Diameter) 21 mm
Voltage: 3.6V
Maximum continuous discharge current: 10A

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Samsung INR21700-50E 5000mAh Rechargeable Battery

The Samsung INR21700-50E is a lithium-ion rechargeable battery with a rated capacity of 5000mAh and a rated voltage of 3.6V. The maximum continuous discharge current is 10A, and the maximum discharge current reaches 15A.

The battery lasts for up to 500 charge-discharge cycles and is suitable for devices that require a stable and long-lasting power supply.

Technical Specifications

Specifications	Value
Model	INR21700-50E
Brand	Samsung
Rated Capacity	5,000 mAh
Minimum capacity	4,900 mAh
Rated Voltage	3.6V
Voltage at the end of charging	4.20 V
Voltage at the end of the discharge	2.5V
Max. continuous discharge current	10A
Maximum discharge current	15A
Normal charging	2,450 mA
Fast Charging	4,900 mAh
Elevation	70 mm
Diameter	21 mm
Weight	69 years (approx.)
Peak Type	Flat
Number of cycles	500

A battery with or without protection?

Batteries with protection circuits contain a small circuit board in the anode or cathode. It protects against overcharging, over-discharging, and excessive current—it simply shuts off when necessary.

Batteries with protection have a raised positive terminal and are suitable for flashlights with mechanical reverse-polarity protection. These include models from Acebeam, Olight, Fenix, Nitecore, Armytec, and similar brands.

Protected batteries are not suitable for flashlights such as Zebralight and Dulotec, which are designed for unprotected batteries. They are slightly longer and wider than standard batteries due to the added components.

Some flashlights require a higher current, which protected batteries cannot provide. Check the size of the original battery in mm and compare it to the technical specifications of the new one.

Operating Instructions

Charge the battery using a high-quality lithium-ion battery charger before using it for the first time.
Do not use or store in high temperatures or humid environments.
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 throw into fire or water—risk of fire or explosion.
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, charge it before using it again.

Safety Rules

Do not modify, puncture, cut, or short-circuit the device.
Do not expose to water, fire, or extreme temperatures.
Do not use in defective devices.
Do not overcharge or over-discharge the battery.
Do not charge at sub-zero temperatures.
Do not use the battery if the foil is damaged.
Always store it in its protective case—not in a pocket or purse.

Frequently Asked Questions

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

Protected batteries have a small built-in circuit board that protects the cell from overcharging, over-discharging, and excessive current. When critical thresholds are reached, the circuit board breaks the circuit. Non-protected batteries do not have this circuit board and are slightly shorter and narrower. The Samsung INR21700-50E is a non-protected battery with a flat top. It is suitable for flashlights designed for a standard size and a higher discharge current.

What types of flashlights is the Samsung INR21700-50E battery suitable for?

This battery is suitable for flashlights designed for a 21700-sized cell with a flat positive terminal. It is compatible with flashlights that do not require a battery with a protruding positive terminal or built-in electronic protection. Before purchasing, check the dimensions of the original battery—21 mm in diameter and 70 mm in height. If in doubt, contact the Dulotec.COM team for clarification.

How many charge cycles does this battery last?

The Samsung INR21700-50E is designed for up to 500 full charge-discharge cycles. To achieve the maximum number of cycles, it is recommended that charging and discharging be performed within the specified operating temperatures. Avoid storing the battery in a fully discharged state for an extended period.

At what temperatures can the battery be used and stored?

Charging is permitted at temperatures ranging from 0°C to 45°C. Discharging is permitted over a wider range—from -20°C to 75°C. The recommended storage temperature is between -5°C and 35°C. Storage at extreme temperatures reduces the battery’s capacity and lifespan.

What is the difference between normal and fast charging?

During normal charging, the current is 2450 mA, which puts less strain on the battery cell. During fast charging, the current reaches 4900 mA, which reduces the time required for a full charge. To extend the battery’s lifespan, it is recommended to use normal charging mode whenever possible. Use only a high-quality charger that is compatible with lithium-ion cells.

How can we safely store a 21700 battery?

The battery should be stored in a protective plastic case, separate from metal objects. Do not place it in a pocket or bag without protection—contact with coins or keys can cause a short circuit. Keep it away from moisture, direct sunlight, and high temperatures. If the battery has not been used for more than 3 months, charge it before use.

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

Measure the diameter and height of the flashlight’s original battery in millimeters and compare them to the specifications of the INR21700-50E—21 mm in diameter and 70 mm in height. Check whether the flashlight requires a battery with a flat or raised positive terminal. If you’re not sure, contact Dulotec.COM and we’ll recommend the right option for your device.