Description
LG H51 21700 Cell – 5000mAh 25A – High-Capacity Lithium-Ion Battery
The LG INR21700 H51 is a high-performance, high-capacity lithium-ion cell designed for demanding applications. With a large 5000mAh capacity and up to 25A continuous discharge, it’s a well-balanced choice for e-bikes, scooters, tools, and custom 21700 battery builds.
This cell is part of LG’s newest generation of cylindrical energy solutions — engineered for extended durability, offering over 1000 cycles at 80% capacity retention under 1C usage. Comparable in energy density to the Samsung 50G and EVE 50E, but rated for significantly higher current output.
Specifications:
| Model | INR21700 H51 |
| Size | 21700 |
| Nominal Capacity | 5000mAh |
| Nominal Voltage | 3.63V |
| Max Voltage | 4.2V |
| Cut-off Voltage | 2.5V |
| Max Continuous Discharge | 25A |
| Standard Charge Current | 2.45A (0.5C) |
| Max Charge Current | 5A (1C) |
| Chemistry | INR (Li-ion) |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Weight | ~70.1g |
| Dimensions | 21.4mm × 70.1mm |
| Cycle Life | ≥80% capacity after 1000 cycles @ 1C |
| Datasheet | Datasheet |
Applications:
- ✅ High-Power E-Bikes & Scooters
- ✅ Power Tools
- ✅ Portable Energy Storage
- ✅ Custom 21700 Packs
- ✅ DIY High-Drain Builds
DIY500AMP.COM Design – Built for 25A High-Performance Loads
⚠️ 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