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
Reliance RS50 21700 CCC Cell – 5000mAh 70A – High-Performance Lithium-Ion Cell - In stock
Continuous discharge: 70A
The Reliance RS50 21700 5000mAh 70A is a next-gen high-drain cell designed for serious power. With an impressive 70A continuous discharge rating (with 80°C cutoff), robust thermal stability, and strong cycle retention, this cell is ideal for e-bikes, scooters, power tools, high-output battery builds, and more.
This cell is a tabless design and outperforms most top-tier cells like JP40, Molicel P50B, and Molicel P45B—while delivering performance very similar to the EVE 50PL. It handles aggressive loads with less voltage sag, lower resistance, and excellent thermal stability under stress.
This product is a final production cell and is CE and CCC certified. These are not pre-production or prototype cells. According to independent testing performed by PAJDA, this cell is currently the tabless lithium-ion cell with the longest lifespan tested, demonstrating exceptional cycle durability and stability under high-load conditions.
Specifications:
| Model | INR21700-RS50 |
| Size | 21700 |
| Nominal Capacity | 5000mAh (Min. 4950mAh) |
| Nominal Voltage | 3.6V |
| Max Voltage | 4.2V |
| Min Discharge Voltage | 2.5V |
| Max Continuous Discharge | 70A (with 80°C cut-off) |
| Standard Charge Current | 2.5A |
| Max Charge Current | 15A |
| Chemistry | INR (NCA/NMC) |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Approx. Weight | 67g |
| Dimensions | 21.35mm × 70.30mm (Max) |
| Datasheet | Datasheet |
Applications:
- ✅ High-Performance E-Bikes
- ✅ Electric Scooters
- ✅ Power Tools
- ✅ Heavy-Duty Battery Packs
- ✅ Custom 21700 Builds
DIY500AMP.COM Design – High-Drain Ready, Performance Certified
⚠️ Safety Warning for Lithium-Ion Battery Usage
Customers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled. Always charge batteries on fire-resistant surfaces, and never leave them charging unattended.
By purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium-ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices
- Must Be Used in a Protected Pack
- Spot Weld Only – Do Not Solder Directly
- 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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Let customers speak for us
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!
VN in AZ
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