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
TENPOWER 50XG 21700 Cell – 5000mAh High-Power Lithium-Ion Battery - Check availability
Continuous discharge: 40A
The TENPOWER 50XG 21700 5000mAh is a high-power lithium-ion cell designed for applications that need strong current delivery, low internal resistance, and solid runtime.
With a 5000mAh typical capacity, 3.6V nominal voltage, and very high discharge capability, this cell is well suited for high-performance battery packs, electric mobility systems, power tools, robotics, high-output flashlights, and other demanding rechargeable power assemblies.
This cell uses a flat top 21700 format and is best used in properly engineered battery packs with an appropriate BMS/PCB and thermal management. It is intended for users who need high power density and stable voltage under load.
Specifications:
| Model | INR21700-50XG |
| Brand | TENPOWER |
| Size | 21700 |
| Nominal Capacity | 5000mAh |
| Minimum Capacity | 4950mAh |
| Nominal Voltage | 3.6V |
| Max Voltage | 4.2V |
| Min Discharge Voltage | 2.5V |
| Max Continuous Discharge | 40A continuous (without temperature cutoff), up to 90A with 75°C temperature cutoff |
| Max Pulse Discharge | 140A (3 seconds) |
| Standard Charge Current | 0.5C (2.5A, CCCV) |
| Max Charge Current | 15A |
| Internal Resistance | ≤4mΩ (AC 1kHz) |
| Chemistry | Li-ion (INR / NCA) |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Approx. Weight | 70g typ, 75g max |
| Dimensions | ≤21.50mm × ≤70.50mm |
| Operating Temperature | Charge: 0 to 45°C; Discharge: -20 to 60°C |
| Cycle Life | ≥500 cycles to 60% of initial capacity |
| Reference Spec | Reference Spec |
Applications:
- ✅ High-Performance E-Bikes
- ✅ Electric Scooters
- ✅ Power Tools
- ✅ Heavy-Duty Battery Packs
- ✅ Custom 21700 Builds
DIY500AMP.COM Design – High-Power 21700 Performance
⚠️ Safety Warning for Lithium-Ion Battery Usage
Customers should understand proper lithium-ion battery handling before use. These cells can present fire, burn, or explosion hazards if short-circuited, overcharged, physically damaged, overheated, or used outside manufacturer specifications. Always charge on a fire-resistant surface and never leave charging batteries unattended.
By purchasing or using this battery, the user assumes responsibility for correct handling, pack integration, charging, discharge limits, and protection. This cell is best used in a protected battery pack with an appropriate BMS/PCB and proper thermal control. Only use chargers and charging methods designed for this battery type, and never mix old and new cells in the same pack.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices
- Must Be Used in a Properly Managed Pack
- Spot Weld Only – Do Not Solder Directly
- Use Appropriate BMS and Thermal Protection
- Store in Fireproof Container
- Inspect Before Use
- Follow Manufacturer Specs Strictly
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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Wow, these cells are great!
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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