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Samsung 18650 25R 2500mAh 20A Battery

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The Samsung 18650 25R 2500mAh 20A Battery, also known as the INR18650 25R, is a rechargeable NMC lithium-ion battery that offers a great balance of capacity, performance, and safety. The Samsung...

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SKU: Samsung 18650 25R 2500mAhN/AAvailability : In StockIn StockOut of stockCategories: 18650 Lithium Battery

The Samsung 18650 25R 2500mAh 20A Battery, also known as the INR18650 25R, is a rechargeable NMC lithium-ion battery that offers a great balance of capacity, performance, and safety. The Samsung 25R battery has a high capacity of 2500mAh, a high performance of 20A continuous discharge, cycle life of over 500 times, and maintain a stable voltage, ensuring a consistent power supply to your devices.



Nominal discharge capacity


Charge: 1.25A, 4.20V,CCCV 125mA cut-off, Discharge: 0.2C, 2.5V discharge cut-off

Nominal voltage


Standard charge

CCCV, 1.25A, 4.20 ± 0.05 V, 125mA cut-off

Rapid charge

CCCV, 4A, 4.20 ± 0.05 V, 100mA cut-off

Charging time

Standard charge : 180min / 125mA cut-off

Rapid charge: 60min (at 25℃) / 100mA cut-off

Max. continuous discharge (Continuous)

20A(at 25℃), 60% at 250 cycle

Discharge cut-off voltage End of discharge


Cell weight

45.0g max

Cell dimension

Height : 64.85 ± 0.15mm

Diameter : 18.33 ± 0.07mm


Operating temperature (surface temperature)

Charge :   0 to 50℃

(recommended recharge release < 45℃)

Discharge: -20 to 75℃

(recommended re-discharge release < 60℃)

Storage temperature

(Recovery 90% after storage)

1.5 year   3 months 1 month





Samsung 18650 25R 2500mAh 20A Battery WARNING:

  • Use dedicated charger of 18650 25R Samsung battery.
  • Use or charge the battery only in the dedicated application.
  • Don't charge the battery by an electric outlet directly or a cigarette lighter charger.
  • Don't charge the battery reversely.
  • Don't leave the 18650 25R Samsung battery near the fire or a heated source.
  • Don't throw the battery into the fire.
  • Don't leave, charge or use the battery in a car or similar place where inside of temperature may be over 60°C.
  • Don't immerse, throw, wet the battery in water / seawater.
  • Don't fold the battery cased with laminated film such as pouch and Polymer.
  • Don't store the 18650 25R Samsung battery in a pocket or a bag together with metallic objects such as keys, necklaces, hairpins, coins, or screws.
  • Don't short circuit (+) and (-) terminals with metallic object intentionally.
  • Don't pierce the battery with a sharp object such as a needle, screw drivers.
  • Don't heat partial area of the battery with heated objects such as soldering iron.
  • Don't hit with heavy objects such as a hammer, weight.
  • Don't step on the battery and throw or drop the battery on the hard floor to avoid mechanical shock.
  • Don't disassemble the battery or modify the battery design including electric circuit.
  • Don't solder on the 18650 25R Samsung battery directly.
  • Don't use seriously scared or deformed battery.
  • Don't put the battery into a microwave oven, dryer ,or high-pressure container.
  • Don't use or assemble the battery with other makers' batteries, different types and/or models of batteries such as dry batteries, nickel-metal hydride batteries, or nickel-cadmium batteries.
  • Don't use or assemble old and new batteries together.
  • Stop charging the battery if charging isn't completed within the specified time.
  • Stop using the 18650 25R Samsung battery if the battery becomes abnormally hot, order, discoloration, deformation, or abnormal conditions is detected during use, charge, or storage.
  • Keep away from fire immediately when leakage or foul odors are detected. If liquid leaks onto your skin or cloths, wash well with fresh water immediately.
  • If liquid leaking from the battery gets into your eyes, don't rub your eyes and wash them with clean water and go to see a doctor immediately.
  • If the terminals of the battery become dirty, wipe with a dry cloth before using the battery.
  • The battery can be used within the following temperature ranges. Don't exceed these ranges: charge temperature ranges : 0°C ~ 45°C; discharge temperature ranges : -20°C ~ 60°C; store the battery at temperature below 60°C.
  • Cover terminals with proper insulating tape before disposal.

Free Shipping to Lower 48

TYCORUN Lithium will ship your batteries for free anywhere in the lower 48 US States. Batteries ship UPS ground freight and will arrive in 5-7 days to most of the US. You will receive an email with a tracking number after your order ships. The USPS does not allow for batteries to be shipped to Post Office boxes (PO Box). Please use a street address. Larger batteries (over 300 watts) require hazmat shipping. We pay the cost of Hazmat and freight (typically $90 to $150 a battery). You pay $0 for shipping. Shipping to Alaska and Hawaii is higher due to federal law that requires that batteries ship Air Freight and have Hazmat protection. Shipping to Canada includes duty, GST and import fees.

Shipping to Canada?

TYCORUN Lithium can ship to most Canadian provinces served by UPS or FedEx. Canadian shipping is calculated at checkout and we pay for duty & GST fees for you. The fastest way to calculate your estimated shipping cost outside of the contiguous United States (“Lower 48”) would be to add the desired product(s) to your cart on our site and enter your shipping information. This will not complete the transaction, but will give the system enough information to calculate the cost. The total price and cost breakdown should update with the new totals.

Can I get my battery shipped to me faster?

TYCORUN Lithium can ship to most Canadian provinces served by UPS or FedEx. Canadian shipping is calculated at checkout and we pay for duty & GST fees for you. The fastest way to calculate your estimated shipping cost outside of the contiguous United States (“Lower 48”) would be to add the desired product(s) to your cart on our site and enter your shipping information. This will not complete the transaction, but will give the system enough information to calculate the cost. The total price and cost breakdown should update with the new totals.

Battery FAQ

1.How safe are Lithium Ion Batteries?
Our LiFePo4 batteries are considered to be safe, non-flammable and non-hazardous by international and federally regulated standards.

2.What can I use a Lithium Battery for?
Our Batteries are commonly used for marine, RV and golf cart applications. You can use our lithium batteries for any application that would normally use a single or multiple lead acid, GEL or AGM batteries.

3.How do I change my batteries to Lithium?
After you take out your old batteries, place our batteries in the same way. You can use the same cables to reconnect into the Lithium Battery.

4.How do I charge a Lithium battery?
Our lithium ion technology uses the latest and most advanced built-in battery protection system to prevent damage to the battery. You may utilize a standard charger for our products, although in some cases a lithium charger may be required to charge the batteries.

5.What battery do I need for my RV or Camper Van?
The industry standard house battery size used in most RVs, Campers, and #VanLife builds is the 12v 100Ah battery. This is a drop in replacement for AGM and most lead acid batteries. If you are charging off your engine's alternator we recommend a Victron DC-DC smart charger. If charging off solar panels we recommend a Victron Smart Solar charge controller, or if you have a solar charge controller choose the lithium setting. A handy size chart for number of batteri

Inverter FAQ
1.Is a 3000W inverter safe?
A 3000W inverter is generally safe, provided it is installed and used correctly. Following our user manual, purchasing recommendations, and local electrical regulations are key to ensuring safety. Make sure the inverter is not exposed to adverse environmental conditions such as high temperatures, high humidity, or direct sunlight, and keep it away from liquids to enhance safety. Additionally, avoid inserting metal objects into the inverter's ventilation ports and disconnect the power supply before operation.

2.Where can a 3000W inverter be used?
A 3000W inverter is suitable for various applications, including but not limited to home backup power, solar power generation, camping and outdoor activities, and commercial use.

3.How do you use a 3000W inverter?
Place the inverter in a well-ventilated location away from high temperatures and humidity.
Connect the appropriate DC power source to the inverter's DC input port.
Connect the devices you want to power to the inverter's AC output ports.
Turn on the inverter, and monitor the indicator lights to check the operational status.
During use, regularly inspect the inverter to ensure it is operating correctly.

4.How long can a 3000W inverter be used?
The lifespan of a 3000W inverter varies depending on its quality and usage. Typically, it can last between 5 to 15 years. Regular maintenance and proper usage can extend the inverter's lifespan. Higher-quality inverters tend to be more durable and provide longer-term reliability.

5.How do you connect a 3000W inverter to a battery?
Ensure the battery is in good working condition and has the required voltage and capacity.
Use the correct cables to connect the positive/negative terminal of the battery to the positive/negative terminal of the inverter's DC input.
Securely fasten the cables, ensuring they are not damaged or loose.
Turn on the inverter to begin converting the battery's DC power into AC power.

Please exercise caution when connecting the batte

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The 18650 25R Samsung battery, also known as the INR18650 25R, is a rechargeable lithium-ion batteries. This is a NMC lithium-ion battery that offers a great balance of capacity, performance, and safety.

In this article, we will explain what an 18650 25R Samsung battery is, what it means, what it is used for, and what its advantages are. We will also give you some tips on how to use and maintain it properly and where to buy it at the best price.


1. What is an 18650 25R battery?

An 18650 25R battery is a type of rechargeable lithium-ion battery that has a cylindrical shape. The name 18650 comes from its dimensions: 18mm x 65mm. The Samsung 25R 18650 battery is a popular and widely sold model of this type of battery. The model number 25R in its name provides crucial information about the battery's specifications. But what exactly does "25R" mean?

2. What does 25R mean on a battery?

The 25R on a battery means that it has a nominal capacity of 2500mAh (milliampere-hours), which is the amount of charge that the battery can hold and deliver. This means that the battery can theoretically provide a current of 2500mA (milliamperes) for one hour or a lower current for a longer time before it needs to be recharged.


3. What are 18650 25R batteries used for?

18650 25R Samsung batteries are incredibly versatile and find applications in a wide range of devices. Some common uses include:

  • Flashlights: High-performance flashlights that require a constant and powerful energy source benefit from the 18650 25R's capabilities.
  • Power banks: Some portable electronics used to use these batteries , but recently soft pack cells are more commonly used.
  • Power tools: Cordless power tools often use 18650 batteries to deliver the necessary power for extended use.
  • Electric vehicles: Some smaller electric vehicles, such as e-bikes, may use 18650 battery pack as power wheels battery, including the 25R or 21700 battery, for their energy storage needs.
  • Vaping devices: Many enthusiasts rely on the 18650 25R to power their vape mods due to its high discharge rating and reliability.

    4. Advantages of Samsung 25R 18650 battery

    • High capacity: The Samsung 25R battery has a high capacity of 2500mAh, which means that it can store and deliver more energy, which translates into longer usage time and fewer recharges.
    • High performance: The Samsung 25R battery has a high performance of 20A continuous discharge and 35A pulse discharge, which means that it can provide faster charging speed and higher output for devices that require high current.
    • Stable voltage output: Samsung's 25R batteries maintain a stable voltage throughout most of their discharge cycle, ensuring a consistent power supply to your devices.
    • Long cycle life: These batteries can endure 500 charge and discharge cycles, making them a cost-effective and eco-friendly choice.

    5. How long do Samsung 25R 18650 batteries last?

    The lifespan of an 18650 25R Samsung battery depends on factors such as usage patterns, discharge rates, temperature and charging practices. The battery has a maximum continuous discharge rating of 20A (amperes), which is the amount of current that the battery can safely provide without overheating or damaging itself.

    On average, a Samsung 25R battery can last for about 400 to 500 charge cycles before its capacity drops to 80% of its original value. This means that if you use and charge your battery every day, it can last for about one to two years before it needs to be replaced.


    6. Using tips on Samsung 25R 18650 battery

    To maximize the lifespan and performance of your 18650 25R Samsung battery, consider the following tips:

    • Using a compatible charger can ensure that your battery is charged properly and safely. You should use a smart charger that can adjust the charging current and voltage according to the specifications of your battery. You should also use a charger that has protection features such as overcharge protection, over-discharge protection, short-circuit protection, etc. The original charger that come with your electric device is the most recommended charger.
    • Avoid overcharging or over-discharging the battery, as this can degrade its capacity.
    • Store batteries in a cool, dry place away from extreme temperatures and direct sunlight.
    • Always use the battery in devices with the recommended voltage and current requirements.

    7. How to maintain an 18650 25R Samsung battery

    Proper maintenance is essential to ensure your 18650 25R Samsung battery continues to perform optimally.

    • Regularly inspect the battery for signs of damage or wear, and replace it if you notice any abnormalities.
    • Clean the battery contacts and terminals as needed to maintain a good connection.
    • Storing the battery at a partial charge, typically around 50%, is recommended for long-term storage.
    • In addition, the 18650 25R Samsung battery should be placed in a cool and ventilated place to avoid high temperature and direct sunlight, in case that high temperature will affect the charge and discharge performance of the battery.

      8. Where to buy an 18650 25R Samsung battery at the best price?

      If you're on the hunt for the best deals on Samsung 25R 18650 batteries, look no further than Tycorun. Tycorun is a trusted and reputable online store that specializes in selling high-quality LFP battery for various applications. We offer genuine, high-quality batteries, including the 18650 25R, at competitive prices. With Tycorun, you can be sure you're getting genuine products that meet your performance expectations. And you can also check battery stores near me.

      9. FAQs

      ① What is the capacity of the 25R battery?

      The capacity of the 25R battery is 2500mAh (milliampere-hour), which means it can deliver 2.5 amps of current for one hour. This is a moderate-high capacity for an 18650 battery.


      ② How do I know if my 18650 battery is bad?

      You can know if your 18650 25R Samsung battery is bad by checking for some signs, such as:

      • The voltage is low or drops quickly after charging. A healthy 18650 battery should have a nominal voltage of 3.6V or 3.7V and a maximum voltage of 4.2V. If the voltage is lower than 3V or drops rapidly after use, the battery may be damaged or worn out.
      • The capacity is reduced or inconsistent. A bad 18650 battery may not be able to hold its rated capacity or may have a large variation in capacity from cycle to cycle.
      • The self-discharge rate is high. A good 18650 battery should be able to retain its charge for a long time when not in use.

      ③ How long does it take to charge Samsung 25R?

      With its maximum continuous charge current of 4A, the Samsung 25R can be fully charged in about 60 minutes when process fast charging at 25℃. However, most chargers have lower current ratings, which take the battery longer to charge, standard charging will take about 180mins.

      ④ Do 18650 batteries expire?

      18650 batteries do not expire in the sense that they have a fixed shelf life, but they do degrade over time and lose their performance and capacity. The degradation rate depends on various factors, such as storage conditions, usage patterns, and battery chemistry.


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