SAMSUNG 25R - Battery 18650 2500mAh

SAMSUNG INR18650-25R BATTERY is a rechargeable Lithium-ion cell in the 18650 format, recognized for its excellent balance of battery life, discharge capability, and reliability. With a nominal capacity of 2500 mAh and a maximum continuous discharge current of 20A, it is suitable for many electronic cigarettes and mods using removable 18650 batteries.

Developed by SAMSUNG SDI, the 25R has a nominal voltage of 3.6V, a maximum charging voltage of 4.2V and a Flat Top positive terminal. It is a reliable solution for users looking for a versatile battery for everyday use.

🔋 2500 mAh capacity

The SAMSUNG 25R has a nominal capacity of 2500 mAh, with a stated minimum capacity of around 2450 mAh.

This capacity offers a good compromise between battery life and discharge capability, which explains the cell’s longstanding popularity among electronic cigarette users.

Actual battery life naturally depends on several factors:

• The power used
• The resistance value
• The frequency of inhalation
• The mod’s electronic efficiency
• The condition and age of the battery

At moderate power, the 25R provides comfortable battery life while maintaining good performance.

⚡ Official continuous discharge of 20A

The SAMSUNG SDI datasheet indicates a maximum continuous discharge current of 20A at 25°C.

The mention 35A sometimes used in certain commercial specifications, does not correspond to the official continuous discharge value of the SAMSUNG 25R.

For reliable and safe use, it is therefore preferable to use:

Maximum continuous discharge current: 20A

This value already covers many configurations of electronic mods compatible with an 18650 battery.

⚙️ 18650 format with a Flat Top terminal

The SAMSUNG 25R uses the standard 18650, widely used in the world of electronic cigarettes.

Its official dimensions are approximately:

• Diameter: 18.3 mm
• Height: 64.9 mm
• Weight: approximately 44 g
• Positive terminal: Flat Top

Before purchasing, always check that your electronic cigarette accepts 18650 batteries.

Some mods now use larger formats such as 20700 or 21700 and therefore require different batteries.

🔬 INR lithium-ion chemistry

The SAMSUNG INR18650-25R uses INR-type lithium-ion chemistry, based on a nickel, cobalt, and manganese composition.

Its main characteristics are:

• Format: 18650
• Nominal capacity: 2500 mAh
• Minimum capacity: approximately 2450 mAh
• Nominal voltage: 3.6V
• Maximum charging voltage: 4.2V
• Maximum continuous discharge: 20A
• Minimum discharge voltage: 2.5V
• Positive terminal: Flat Top
• Unprotected battery

🔌 Standard charging and fast charging

SAMSUNG documentation indicates a standard charge of approximately 1.25A up to a maximum voltage of 4.2V.

A faster charge that can reach 4A is also mentioned in the cell’s specifications, under controlled conditions.

For use in vaping, the use of an a quality external charger compatible with 18650 lithium-ion batteries is also recommended whenever possible.

A gentler recharge can also help preserve the battery’s lifespan.

🛡️ Unprotected battery: essential precautions

The SAMSUNG 25R is a battery unprotected. It does not have an individual electronic circuit designed to prevent short circuits or over-discharge.

It must therefore only be used in a suitable device and handled with care.

A few essential rules:

• Never carry a loose battery in a pocket or bag
• Always use an insulated carrying case
• Avoid any contact with keys, coins, or metal objects
• Never use a battery with a damaged wrap
• Do not expose the battery to excessive heat
• Never puncture or crush the cell
• Always observe the correct polarity
• Use only a charger suitable for lithium-ion batteries

Simultaneous metal contact between the positive and negative terminals can cause a short circuit and an extremely rapid rise in temperature.

🔄 Using it in multi-battery mods

The SAMSUNG 25R can be used in a single-battery 18650 mod or in certain devices operating with two or more batteries.

For a multi-battery mod, it is strongly recommended to use a set of batteries that are:

• Of the same brand
• Of the same model
• Purchased at the same time
• Charged together
• Having undergone the same number of cycles

This practice, often called “marrying batteries,” helps maintain consistent aging among the cells.

💡 When should an 18650 battery be replaced?

A rechargeable battery gradually loses capacity over the course of charge and discharge cycles.

It should be replaced if it shows, in particular:

• A significantly reduced battery life
• Abnormal heating
• Deformation
• A damaged terminal
• Signs of corrosion
• Unusual behavior during charging

A damaged wrap can sometimes be replaced correctly, but a cell with mechanical damage must be taken out of service and recycled through an appropriate facility.

🎯 Who is the SAMSUNG 25R for?

The SAMSUNG 25R 18650 battery is intended for users who own an electronic cigarette or a mod compatible with 18650 cells.

It is particularly suitable for:

• For users seeking a reliable and well-established battery
• For electronic mods using 18650 batteries
• For vapers seeking a capacity of 2500 mAh
• For users needing a continuous current of up to 20A
• For people wishing to have replacement batteries available
• For users seeking a good balance between battery life and performance

⭐ SAMSUNG 25R – a reliable and versatile 18650 battery

With its 2500 mAh capacity, maximum continuous discharge current of 20A, and 18650 Flat Top format, the SAMSUNG 25R remains a versatile reference for many compatible electronic cigarettes.

Reliable, durable, and backed by SAMSUNG SDI’s expertise, it offers an excellent balance between battery life and power, provided the safety rules specific to lithium-ion batteries are followed scrupulously.