Description
Samsung 35E 18650 Cell – 3500mAh – High-Energy Lithium-Ion Battery - Check availability
The Samsung 35E INR18650-35E is a high-energy 18650 lithium-ion cell designed for applications that prioritize long runtime and efficient energy density over very high current output.
With 3500mAh nominal capacity (3350mAh minimum), 3.60V nominal voltage, and 8A continuous discharge, the Samsung 35E is well suited for battery packs, backup power systems, LED lighting, portable energy devices, and other low-to-moderate current applications.
The 35E is commonly used in properly engineered battery packs where runtime, consistency, and compact 18650 format are more important than extreme discharge performance. It should be used with appropriate protection circuitry and pack-level thermal management.
Specifications:
| Model | Samsung INR18650-35E |
| Size | 18650 |
| Typical Capacity | 3500mAh |
| Minimum Capacity | 3350mAh |
| Nominal Energy | 12.6Wh |
| Minimum Energy | 12.1Wh |
| Nominal Voltage | 3.60V |
| Max Voltage | 4.20V |
| Min Discharge Voltage | 2.65V |
| Max Continuous Discharge | 8A |
| Peak / Non-Continuous Discharge | 13A (not for continuous discharge) |
| Standard Charge Current | 1.7A (0.5C) CC/CV to 4.20V, 68mA cut-off |
| Cycle Life Charge Current | 1.02A CC/CV to 4.20V, 100mA cut-off |
| Max Charge Current | 2.0A (not for cycle life) |
| Standard Discharge | 680mA (0.2C), 2.65V cut-off |
| Chemistry | INR (Lithium-ion) |
| Positive Terminal | Flat Top |
| Protected | No (unprotected cell) |
| Rechargeable | Yes |
| Initial Internal Impedance | ≤35mΩ at AC 1kHz |
| Approx. Weight | 50g max |
| Dimensions | ≤18.55mm diameter × ≤65.25mm height |
| Operating Temperature | Charge: 0°C to 45°C / Discharge: -10°C to 60°C |
| Storage Condition | 1 year: -20°C to 25°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C |
| Cycle Life | ≥2010mAh after 500 cycles (about 60% of standard/rated discharge capacity under Samsung test conditions) |
| Datasheet | Datasheet |
Applications:
- ✅ Long-Range E-Bikes
- ✅ Energy Storage Modules
- ✅ Portable Power Stations
- ✅ Solar Backup Battery Packs
- ✅ Endurance-Focused Custom Builds
⚠️ 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 35E 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. Temperature and pack design should be considered during both charging 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
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