Samsung 25R 18650 2500mAh 20A Lithium Battery Cell
Description
Samsung 25R 18650 2500mAh 20A Battery
The Samsung 25R 18650 2500mAh 20A lithium battery cell is one of the most trusted high-drain rechargeable batteries available today. Built by Samsung with guaranteed quality and consistency, it delivers high energy density, low internal resistance, and excellent performance in series or parallel packs. With a maximum continuous discharge of 20A (8C), it is widely used in electric bikes, scooters, power tools, and DIY battery packs.
Samsung 25R 18650 Battery Specification
Model: 25R Samsung
Rated Capacity: 2500mAh
Energy: 9Wh
Minimum Capacity: 2450mAh
Rated voltage: 3.6V
Discharge Cut-off Voltage: 2.5V
Charge Cut-off Voltage: 4.2V
Cycle Life: More than 300 cycles
Dimensions: Φ18*65mm
Weight: 45g
Internal Resistance: Less than 18mΩ
Standard Discharge Current: 0.2C (500mA)
Standard Charge Current: 0.2C (500mA)
Max Continuous Discharge Rate: 8C (20A)
Max Continuous Charge Current: 1.6C (4A)
Charging Temperature: 10 to 45℃;
Discharge Temperature: -20 to 60℃
Storage Temperature:
- -10℃~25℃: 12 months
- -10℃~45℃: 3 months
- -10℃~60 ℃: 1 month
Key Features of Samsung 25R 18650 Battery
High Energy Density
Compact size with 2500mAh capacity, providing reliable and long-lasting power.
Original Samsung Manufacturing
Quality-controlled cells ensure uniform performance and high consistency, making them ideal for multi-cell battery packs.
High Discharge Current
Supports up to 20A continuous output, perfect for high-drain devices such as e-bikes, scooters, and power tools.
Low Internal Resistance
Reduced power loss, less heat generation, and improved efficiency.
Long Cycle Life
Maintains 55%+ capacity after 300 cycles, ensuring durability and cost savings.
Flexible Terminals
Available in flat top and button top versions for compatibility with different applications.
Applications of Samsung 25R 18650 Cell
⚡ Electric Bikes & Scooters – Provides stable high current for smooth acceleration and extended range.
🔨 Power Tools – Ideal for drills, saws, and other cordless equipment requiring high-drain performance.
🎮 Hobby & DIY Battery Packs – Perfect for RC models, drones, and DIY energy storage projects.
🔋 Energy Storage – Can be assembled into custom packs for UPS, solar storage, or portable power banks.
Cestpower provide OEM and custom pack solutions using Samsung 25R cells, meet your needs:
📏 Custom shapes (rectangular, cylindrical, triangular, arc-shaped, etc.)
🔋 Adjustable voltage & capacity configurations
🏷 OEM service (custom labels, heat shrink PVC, packaging)
🔌 Flexible connector and terminal options
Mechanical Characteristics
1, Drop test
Test method: Cell (At shipment or fully charged) drop on a concrete from 1m height at 3 sides.
Standard: No leakage, Voltage decrease less than 25mV, AC IR increase less than 1.0mΩ
2, Vibration test
Test method: To comply to the UN transportation regulation(UN38.3), for each axle (X axle and Y with cylindrical cells) 7 Hz→200 Hz→7 Hz for 15 minutes, repetition twelve times totally 180 minutes, acceleration 1.0g during 7Hz to 18 and 8.0g (amplitude 0.16cm) up to 200 Hz.
Standard: No leakage, and less than 0.01V of OCV drop
Safety
1, Over charging test
Test method: Charging at 20A-20V at 25℃ for 3 hours.
Standard: No fire or explosion.
2, External short circuit test
Test method: To short circuit the standard charged cell (or 50% discharged cell) by connecting positive and negative terminal by 80mΩ wire for 10min.
Standard: No fire or explosion.
3, Reverse charging test
Test method: To charging the standard charged cell with charge current 10A By 0V for 2.5hr.
Standard: No fire or explosion.
4, Heating test
Test method: To heat the standard charging battery cell at ratio 5 ℃ every minute up to 130 ℃ and retain the cell in oven for 10min.
Standard: No fire or explosion.
❓ FAQ
Q1: Is Samsung 25R safe for building battery packs?
Yes. With proper BMS integration, it ensures safety through protections like overcharge, over-discharge, and short-circuit prevention.
Q2: What’s the difference between 25R and other 18650 batteries?
The 25R offers higher discharge current (20A) compared to standard 18650s, making it ideal for high-drain applications.
Q3: Can I use this battery for an e-bike conversion kit?
Absolutely. Its high discharge rate and stability make it one of the most recommended cells for e-bike packs.
Q4: Are Samsung 25r 18650 good for vape
Yes, The Samsung 25R is a popular choice for vapers because it offers a great balance of a 20A continuous discharge rate and a 2500mAh capacity
Q5: Does Samsung inr18650-25r have protection circuit
No, this one is battery cell only, no protection circuit included, but if you need a protection circuit, please just let us know.
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