Description
LG Energy Solution M50LT 21700 Cell – 5000mAh – High-Capacity Lithium-Ion Battery - Check availability
The LG Energy Solution INR21700 M50LT is a high-capacity 21700 lithium-ion cell intended for LEV battery packs and protected battery assemblies where strong energy density and long cycle life are important.
With 3.69V nominal voltage, 18.2Wh nominal energy, and up to 14.4A maximum continuous discharge depending on temperature, the M50LT is suited to engineered pack applications rather than loose-cell consumer use.
LG specifies the M50LT as a cylindrical rechargeable lithium-ion battery cell and emphasizes battery-pack use with protective circuitry, with cycle life rated to ≥80% of initial energy after 1,000 cycles under the stated test conditions.
Specifications:
| Model | LG Energy Solution INR21700M50LT |
| Size | 21700 |
| Typical Capacity | 5000mAh |
| Minimum Capacity | 4800mAh |
| Nominal Energy | 18.2Wh |
| Minimum Energy | 17.6Wh |
| Nominal Voltage | 3.69V |
| Max Voltage | 4.20V |
| Min Discharge Voltage | 2.50V |
| Max Continuous Discharge | 14.4A (3.0C) at 10–25°C; 7.2A at 25–55°C; 2.4A at -20–10°C |
| Standard Charge Current | 1.44A (0.3C) CC/CV to 4.20V, 50mA cut-off |
| Max Charge Current | 1.44A at 0–25°C; 3.36A at 25–45°C |
| Standard Discharge | 0.96A (0.2C), 2.50V cut-off |
| Chemistry | Lithium-ion |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Initial AC Impedance | 15 ±6mΩ at 1kHz |
| Initial DC Impedance | 23 ±6mΩ at 50% SOC |
| Approx. Weight | 67.5 ±1.0g |
| Dimensions | ≤21.44mm diameter × ≤70.65mm height |
| Operating Temperature | Charge: 0°C to 45°C / Discharge: -20°C to 55°C; max cell surface temperature should remain below 70°C during discharge |
| Storage Condition | Shipping state: -20°C to 55°C within 1 month; -20°C to 45°C within 3 months; -20°C to 25°C within 1 year; storage humidity under 50% |
| Cycle Life | ≥80% of initial energy after 1,000 cycles at 0.3C charge / 0.5C discharge, 25°C |
| 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 intended for battery-pack use only with protective circuitry. Mishandling, unapproved use, short-circuiting, overheating, overcharging, puncture, or physical damage can cause fire, burns, or serious injury.
LG explicitly warns that this cell is not intended for stand-alone consumer use and should not be used as a removable power source for devices such as e-cigarettes, lanterns, or flashlights. Use only in a properly engineered battery pack with suitable BMS/BMU protection and temperature monitoring.
Important Usage Guidelines:
- Battery Pack Use Only – Not for Stand-Alone Consumer Use
- Use with Proper Protective Circuitry / BMS / BMU
- Spot Weld Only – Do Not Solder Directly
- Do Not Use if Wrap Is Damaged
- Prevent Shorts – Keep Away from Loose Metal Objects
- Not for E-Cigarettes, Lanterns, or Flashlights
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