For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
Samsung 25R 18650 Cell – 2500mAh – High-Drain Lithium-Ion Battery - Check availability
Continuous discharge: 20A
The Samsung 25R 18650 is a high-drain lithium-ion rechargeable cell built for applications that need a strong balance of power output, reliability, and proven 18650 form factor performance.
Using the INR18650-25R (Version 5) specification, this cell provides 2500mAh standard discharge capacity, 2450mAh rated discharge capacity, 3.60V nominal voltage, and 20A maximum continuous discharge at 23°C.
Samsung positions the 25R as a cell for power tools, and it is also widely used in high-drain battery packs, flashlights, robotics, and other custom 18650 builds when proper protection, thermal design, and pack engineering are used.
Specifications:
| Model | Samsung INR18650-25R |
| Size | 18650 |
| Typical Capacity | 2500mAh |
| Minimum Capacity | 2450mAh |
| Nominal Energy | 9.0Wh |
| Minimum Energy | 8.82Wh |
| Nominal Voltage | 3.60V |
| Max Voltage | 4.20V |
| Min Discharge Voltage | 2.50V |
| Max Continuous Discharge | 20A (at 23°C) |
| Standard Charge Current | 1.25A (0.5C) CC/CV to 4.20V, 125mA cut-off |
| Rated Charge Current | 4.0A CC/CV to 4.20V, 100mA cut-off |
| Standard Discharge | 0.5A (0.2C), 2.50V cut-off |
| Chemistry | INR (Lithium-ion) |
| Rechargeable | Yes |
| Initial AC Impedance | ≤18mΩ at 1kHz (typ. 13.2mΩ) |
| Approx. Weight | 45.0g max |
| Dimensions | ≤18.40mm diameter × ≤65.00mm height |
| Operating Temperature | Ambient — Charge: 0°C to 45°C / Discharge: -20°C to 60°C; Cell surface — Charge: 0°C to 50°C (recommended recharge release <45°C) / Discharge: -20°C to 80°C (recommended re-discharge release <60°C) |
| Storage Condition | 1.5 years: 0°C to 23°C; 3 months: 0°C to 45°C; 1 month: 0°C to 60°C |
| Cycle Life | ≥1500mAh after 250 cycles (60% of standard capacity at room temperature) using 4.0A charge / 20A discharge test conditions |
| Datasheet | Datasheet |
Applications:
- ✅ High-Performance E-Bikes
- ✅ Electric Scooters
- ✅ Power Tools
- ✅ Heavy-Duty Battery Packs
- ✅ Custom 21700 Builds
DIY500AMP.COM Design – Classic 25R High-Drain Performance
⚠️ Safety Warning for Lithium-Ion Battery Usage
This cell is a rechargeable lithium-ion battery. Mishandling, short-circuiting, overheating, overcharging, puncture, crushing, or physical damage can cause fire, burns, or serious injury.
The Samsung 25R should be used in a properly engineered battery pack or host device with over-charge, over-discharge, over-current, over-heat, and short-circuit protection. Cell temperature should be monitored during charge and discharge.
Important Usage Guidelines:
- Use in a Properly Protected Battery Pack / Host Device
- Monitor Temperature During Charge and Discharge
- Spot Weld Only – Do Not Solder Directly
- Do Not Use if Wrap or Insulator Is Damaged
- Prevent Shorts – Keep Away from Loose Metal Objects
- Do Not Overcharge, Over-Discharge, Crush, Puncture, or Burn
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
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