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 50E 21700 Cell – 5000mAh – High-Energy Lithium-Ion Battery - Check availability
Continuous discharge: 9.8A
The Samsung 50E 21700 5000mAh is a high-energy lithium-ion cell designed for applications that need maximum runtime, strong energy density, and dependable moderate-current delivery.
With 5000mAh typical capacity (4900mAh minimum), 3.63V nominal voltage, and 9.8A continuous discharge, this cell is well suited for long-range battery packs, e-bikes, energy storage systems, portable power stations, and custom 21700 builds where runtime matters most.
Samsung SDI’s specification emphasizes proper battery-pack design, protective circuitry, temperature control, and welded pack assembly, making this cell best suited for properly engineered battery packs rather than direct loose-cell installation.
Specifications:
| Model | Samsung SDI INR21700-50E |
| Size | 21700 |
| Typical Capacity | 5000mAh |
| Minimum Capacity | 4900mAh |
| Nominal Energy | 18.15Wh |
| Minimum Energy | 17.79Wh |
| Nominal Voltage | 3.63V |
| Max Voltage | 4.20V |
| Min Discharge Voltage | 2.50V |
| Max Continuous Discharge | 9.8A continuous / 14.7A non-continuous |
| Standard Charge Current | 2.45A (0.5C) CC/CV to 4.20V, 98mA cut-off |
| Max Charge Current | 4.90A (not for cycle life) |
| Standard Discharge | 0.98A (0.2C), 2.50V cut-off |
| Chemistry | Li-ion (INR) |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Initial AC Impedance | ≤28mΩ at 1kHz |
| Approx. Weight | 69.5g Max |
| Dimensions | ≤21.25mm diameter × ≤70.80mm height |
| Operating Temperature | Charge: 0°C to 45°C / Discharge: -20°C to 60°C |
| Storage Condition | Store at low temperature (20°C recommended, below 60°C), below 65% humidity, no dust, no corrosive gas; long-term storage at shipping voltage is recommended |
| Cycle Life | ≥3802mAh after 500 cycles (80% of rated discharge capacity; 0.5C charge / 1C discharge at RT) |
| Datasheet | Datasheet |
Applications:
- ✅ Long-Range E-Bikes
- ✅ Energy Storage Modules
- ✅ Portable Power Stations
- ✅ Solar Backup Battery Packs
- ✅ Endurance-Focused Custom Builds
DIY500AMP.COM Design – High-Energy, Long-Runtime Power
⚠️ Safety Warning for Lithium-Ion Battery Usage
This cell must be used with proper protective circuitry. Mishandling, short-circuiting, overheating, overcharging, puncture, immersion, or physical damage can cause fire, burns, or serious injury.
Samsung SDI’s pack design guidance requires controlled charge/discharge limits, short-circuit protection, and welded pack connections rather than direct soldering. Use only in a properly engineered battery pack with suitable BMS/PCM protection and thermal management.
Important Usage Guidelines:
- Use in Properly Engineered Battery Packs
- Use with Proper Protective Circuitry / BMS / PCM
- Spot Weld Only – Do Not Solder Directly
- Do Not Short-Circuit the Cell
- Do Not Disassemble, Incinerate, or Immerse in Water
- Do Not Charge Below 0°C or Above 45°C
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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I purchased some of these tabless cells to try on my 1S 3" HD Toothpick drone build, and, albeit a bit heavy for 1S, it flies pretty well. Not a freestyle monster, but an endurance beast with decent send. These cells shrug off the demands of a BETAFPV Matrix HD AIO flight controller/12A ESC and some 1202.5 11000KV motors. I'm getting 15+ minutes of speedy flight time from a single cell trying not to go below 3.2V, and about 20+ minutes cruising. Love these cells and will definitely buy more when time comes, only from DIY500AMP, who are terrific!
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