Samsung 25R 18650 2500mAh 20A Lithium Battery Cell
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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